May 2019 - Mike Krzesowiak

How To Air Seal Your Chimney Flue With A Chimney Balloon

May 27, 2019 | Air Sealing

Chances are if you have a fireplace you’re losing heat through the chimney when you’re not burning the fire. Most chimneys don’t air seal well and are notoriously leaky. Or as I like to say, “Leakier than a porcupine’s water bed.”

Most fireplaces have a cast iron damper in the firebox. The dampers usually don’t seat well and allow a lot of air to get by anyways. The most effective way to seal a chimney is going to be to get up on your roof and seal the top of the chimney, this usually tends to be a little more permanent so it could be a good solution if you don’t plan on using your fireplace.

But if you plan to use the fireplace occasionally you may want a less permanent solution. An inflatable chimney balloon or bladder could be a good solution for you. They are relatively easy to install will only take you 5-10 minutes.

You can see the one I installed in my home and how I did it here:

https://youtu.be/fxHXIF2C1Bs

Here’s an example of an inflatable balloon you use to temporarily seal your chimney: https://www.amazon.com/gp/product/B000ILEIFY

How To Find Your Rear Differential Gear Ratio

May 22, 2019 | Trucks

Ever wonder how to find the gear ratio for your rear differential? This will help you find your gear ratio on a Ford or GMC/Chevrolet Truck.

First, you’re going to need to locate the manufacturer’s sticker on your truck with the code. Here is a video that will show you where to find that sticker:

Ford places their sticker on the driver’s side door at about thigh height. It’s visible when you open the door (usually on the door frame).

GM has a sticker placed in the glove box. If your GM vehicle doesn’t have this sticker (sometimes they don’t unfortunately) you may need to take your VIN to a dealer ask them to look it up for you.

Second, cross-check the code on your sticker with the ones listed below. This is usually a little easier on a Ford than GM. I’ve listed below all the axle codes that I am aware of for these manufacturers. Keep in mind if your rear differential has ever been modified or replaced with another, these codes may no longer represent your actual rear differential gears.

Ford Axel Codes and Their Corresponding Information

Axel Code (From Door Sticker)	Axel Type	Capacity Ibs	RATIO	Year
01	Ford 9″	2800	2.75
02	Ford 9″	2800	3.00
04	Ford 9″	2800	3.25
07	Ford 9″	2800	2.47
12	Ford	3800	2.73	1991
13	Ford 9″	3750	2.75	1981-1983
13	Ford 8.8		4.11	1985-1986
14	Ford 9″	3750	3.00	1981-1986
15	Ford 9″	3750	3.25	1981-1982
15	Ford		3.31
15	Ford 9″	3750	2.73	1983
16	Ford 9″	3750	3.50
16	Ford		3.73
17	Ford	3300	3.25	1971
17	Ford	3800	3.31	1995 / 1999-2002 / Expedition
17	Ford		3.55	1998
17	Ford		3.73	1997
17	Ford 9″	3750	2.47
18	Ford 8.8	3800	3.08	1983-1986
19	Ford 8.8	3800	3.55	1983-1986 / Expedition
22	Dana	5300	4.10
23	Dana 60	5300	3.54
24	Dana 60	5300	3.73	Econoline
25	Ford	5300	4.10	1991
25	Dana 60	5300	3.33
26	Ford	4050	3.55
26			3.73	F-250
27			3.31	F-250
27	Ford	5300	3.73
27	Dana 70	7400	4.10
28	Dana 70	7400	4.56
29	Ford 10.25″	5300	3.55	1991
31	Dana	6250	3.07
31			3.73	F-250 / Excursion
32	Dana	6250	4.10	Econoline
32	Dana 61	5300	3.00
33	Dana 61	6250	3.54
33	Ford		4.30	F-250
34			3.73	Econoline
35			4.09	Econoline
35	Ford	6250	4.10	1991
36	Dana 70	7400	3.73	1980
36			4.56	F-250
37	Dana 60	5300	3.54
38	Ford	6250	3.08
38	Dana 60	5300	3.73
39	Ford 10.25	6250	3.55	1991 Econoline
41	Dana	6250	3.54
41			3.73	F-350
42	Dana	6250	3.73
42	Dana	7400	4.10
43	Dana	7400	3.54
43	Dana	6250	4.10
43			4.30	F-350
44	Dana	6250	4.56
45	Ford	7400	4.10	1991
46			4.56	F-350
49	Ford 10.25	7400	3.55	1991
51	Dana 70 HD	7400	3.73
52	Dana 70 HD	7400	4.10	Econoline
53	Dana 70 HD	7400	4.56	1982
53	Dana 70 HD	7400	3.54	1983-1986
56			4.10	Econoline
61			3.73	F-350
62	Dana	8100	4.10
63	Dana	8200	3.54
63			4.30	F-350
65	Ford	8250	4.10	1991
66			4.56	F-350
69	Ford 10.25	8250	3.25
69	Ford	8250	3.55	1991
72	Dana	6300	4.10
72	Dana	11000	4.63
73	Dana	6300	3.54
73	Dana	11000	5.13
73			4.30	F-450
75			5.38	F-450
78			4.88	F-450
81			3.73
81			4.63	Econoline
82			4.10	F-350
83			4.30	F-350
86			4.56	F-350
88			4.88	F-350
95			5.38	F-550
98			4.88	F-550
B2	Dana	5300	4.10
B3	Dana	5300	3.54
B4	Dana	5300	3.73
B5	Dana 60 – Limited Slip	5300	3.33
B5	Ford 10.25 – Limited Slip		4.10
B6	Ford – Limited Slip	5300	3.55
B6	Ford – Limited Slip		3.73
B7	Ford – Limited Slip	5300	3.73
B9	Ford 10.25 – Limited Slip		3.55
C1	Ford – Limited Slip		3.73	F-250 / Excursion
C2	Dana 61 – Limited Slip	5300	3.00
C2	Dana 61 – Limited Slip	5300	3.54
C2	Dana – Limited Slip	6250	4.10	F-250 / Excursion
C3	Dana Limited Slip	6250	3.54
C3	Ford – Limited Slip		4.30	F-250 / Excursion
C5	Ford 10.25 – Limited Slip		4.10
C6	Ford – Limited Slip		4.56	F-250
C7	Dana 60 – Limited Slip	5300	3.54
C9	Ford 10.25 – Limited Slip		3.55
D1	Limited Slip		3.73	F-350
D2	Limited Slip	7400	4.10
D3	Ford Limited Slip		3.54
D3	Dana – Limited Slip	6250	4.10
D3			4.30	F-350
D5	Ford 10.25 – Limited Slip	7400	4.10
D6	Limited Slip		4.56	F-350
D7	Dana 70 – Limited Slip	5300	4.10
E1	Ford – Limited Slip		3.73
E2	Dana 70 HD – Limited Slip	7400	4.10
E3	Limited Slip		4.30	F-350

2004 Ford Super Duty Axle Codes:

31 — 3.73 non-limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
41 — 3.73 non-limited slip, F-350
61 — 3.73 non-limited slip, F-350
73 — 4.30 non-limited slip, F-450
75 — 5.38 non-limited slip, F-450
78 — 4.88 non-limited slip, F-450
81 — 3.73 non-limited slip, F-350
88 — 4.88 non-limited slip, F-350
95 — 5.38 non-limited slip, F-550
98 — 4.88 non-limited slip, F-550
C1 — 3.73 limited slip, F-250/Excursion
C2 — 4.10 limited slip, F-250/Excursion
C3 — 4.30 limited slip, F-250/Excursion
D1 — 3.73 limited slip, F-350
D2 — 4.10 limited slip, F-350
D3 — 4.30 limited slip, F-350
E2 — 4.10 limited slip, F-350
E3 — 4.30 limited slip, F-350
EW — 4.10 limited slip, F-350 (ambulance package)
F1 — 3.73 limited slip, F-350
F2 — 4.10 limited slip, F-350
F6 — 4.56 limited slip, F-350
G3 — 4.30 limited slip, F-450
G5 — 5.38 limited slip, F-450
G8 — 4.88 limited slip, F-450
GW — 4.88 non-limited slip, F-450
K5 — 5.38 limited slip, F-550
K8 — 4.88 limited slip, F-550
KW — 4.10 non-limited slip, F-550

2007 Ford Super Duty Axle Codes:

37 — 3.73 non-limited slip
3L — 3.73 limited slip
41 — 4.10 non-limited slip
43 — 4.30 non-limited slip
48 — 4.88 non-limited slip
4L — 4.30 limited slip
4N — 4.10 limited slip
4W — 4.10 limited slip (ambulance package)
53 — 5.38 non-limited slip
5L — 5.38 limited slip
8L — 4.88 limited slip

2008 Ford Super Duty Axle Codes:

35 = 3.55 non-limited slip
3J = 3.55 limited slip
37 = 3.73 non-limited slip
3L = 3.73 limited slip
4L = 4.30 limited slip
4N = 4.10 limited slip

But wait…. there’s more. Here’s another chart. Brace yourself.

Axle Code	Positraction	Ratio
005-J	Limited Slip Differential	3.27
12	Conventional non-Positraction Differential	2.73
16	Conventional non-Positraction Differential	3.73
17	Conventional non-Positraction Differential	3.31
18	Conventional non-Positraction Differential	3.06
19	Conventional non-Positraction Differential	3.55
23	Conventional non-Positraction Differential	3.54
24	Conventional non-Positraction Differential	3.54
25	Conventional non-Positraction Differential	4.10
026-F	Conventional non-Positraction Differential	2.73
29	Conventional non-Positraction Differential	3.55
31	Conventional non-Positraction Differential	3.73
32	Conventional non-Positraction Differential	4.10
33 (1992-1998)	Conventional non-Positraction Differential	3.54
33 (1999-2002)	Conventional non-Positraction Differential	4.30
34	Conventional non-Positraction Differential	3.73
35	Conventional non-Positraction Differential	4.10
36	Conventional non-Positraction Differential	4.56
39	Conventional non-Positraction Differential	3.55
040-L	Conventional non-Positraction Differential	3.08
41	Conventional non-Positraction Differential	3.73
42	Conventional non-Positraction Differential	4.10
43	Conventional non-Positraction Differential	4.30
45	Conventional non-Positraction Differential	4.10
46	Conventional non-Positraction Differential	4.56
49	Conventional non-Positraction Differential	3.55
52	Conventional non-Positraction Differential	4.10
054-J	Conventional non-Positraction Differential	3.27
56	Conventional non-Positraction Differential	4.10
58	Conventional non-Positraction Differential	4.86
61	Conventional non-Positraction Differential	3.73
62	Conventional non-Positraction Differential	4.10
63	Conventional non-Positraction Differential	4.30
65	Conventional non-Positraction Differential	4.10
66	Conventional non-Positraction Differential	4.56
68	Conventional non-Positraction Differential	4.88
69	Conventional non-Positraction Differential	3.55
72	Conventional non-Positraction Differential	4.63
73 (1996-2000)	Conventional non-Positraction Differential	5.13
73 (2002)	Conventional non-Positraction Differential	4.30
75 (2002 Motor home – Dana 80)	Conventional non-Positraction Differential	Supply Bill of Material Number
75	Conventional non-Positraction Differential	5.38
78	Conventional non-Positraction Differential	4.88
81	Conventional non-Positraction Differential	3.73
82	Conventional non-Positraction Differential	4.10
83	Conventional non-Positraction Differential	4.30
86	Conventional non-Positraction Differential	4.56
88	Conventional non-Positraction Differential	4.88
95 (2002 Motor home – Dana 135)	Conventional non-Positraction Differential	Supply Bill of Material Number
95	Conventional non-Positraction Differential	5.38
98	Conventional non-Positraction Differential	4.88
102-A	Conventional non-Positraction Differential	3.31
113-A	Limited Slip Differential	3.73
114-A	Conventional non-Positraction Differential	3.73
126-N	Conventional non-Positraction Differential	3.55
127-N	Limited Slip Differential	3.55
130-N	Conventional non-Positraction Differential	4.10
131-N	Limited Slip Differential	4.10
168-S	Conventional non-Positraction Differential	4.10
169-S	Limited Slip Differential	4.10
189-S	Conventional non-Positraction Differential	4.10
192-S	Limited Slip Differential	4.10
199-R	Limited Slip Differential	4.10
203-B	Limited Slip Differential	2.73
209-E	Limited Slip Differential	3.27
221-C	Limited Slip Differential	2.73
223-C	Limited Slip Differential	2.73
225-C	Limited Slip Differential	3.08
227-C	Limited Slip Differential	3.08
229-C	Limited Slip Differential	3.27
231-C	Limited Slip Differential	3.27
262-C	Conventional non-Positraction Differential	2.73
264-C	Conventional non-Positraction Differential	2.73
348F	Conventional non-Positraction Differential	3.27
350-F	Conventional non-Positraction Differential	3.08
352-F	Conventional non-Positraction Differential	3.08
354-F	Conventional non-Positraction Differential	3.73
355-F	Limited Slip Differential	3.55
356-F	Conventional non-Positraction Differential	3.27
357-F	Limited Slip Differential	3.55
359-F	Limited Slip Differential	3.73
362-F	Conventional non-Positraction Differential	3.45
363-F	Limited Slip Differential	3.73
366-F	Conventional non-Positraction Differential	3.45
367-F	Limited Slip Differential	3.73
368-F	Conventional non-Positraction Differential	3.73
370-F	Conventional non-Positraction Differential	3.73
371-F	Limited Slip Differential	4.10
372-F	Conventional non-Positraction Differential	4.10
374-F	Conventional non-Positraction Differential	4.10
430-F	Conventional non-Positraction Differential	3.07
434-F	Conventional non-Positraction Differential	3.27
501-F	Limited Slip Differential	3.27
502-F	Conventional non-Positraction Differential	3.27
511-F	Limited Slip Differential	3.27
515-F	Conventional non-Positraction Differential	3.27
610-B	Conventional non-Positraction Differential	3.27
612-B	Conventional non-Positraction Differential	3.55
613-B	Limited Slip Differential	3.73
614-B	Conventional non-Positraction Differential	3.73
615-C	Limited Slip Differential	4.10
616-B	Conventional non-Positraction Differential	4.10
619-A	Limited Slip Differential	3.37
621-A	Limited Slip Differential	3.73
625-A	Limited Slip Differential	3.27
668-H	Conventional non-Positraction Differential	4.10
674-F	Conventional non-Positraction Differential	3.55
675-F	Limited Slip Differential	3.55
696-H	Conventional non-Positraction Differential	3.73
697-H	Limited Slip Differential	3.73
699-H	Limited Slip Differential	4.10
710-A	Conventional non-Positraction Differential	3.55
711-A	Limited Slip Differential	3.55
740-P	Conventional non-Positraction Differential	3.31
746-A	Conventional non-Positraction Differential	3.55
747-A	Limited Slip Differential	3.55
802-C	Conventional non-Positraction Differential	3.31
820-C	Conventional non-Positraction Differential	3.55
821-C	Limited Slip Differential	3.31
825-C	Limited Slip Differential	3.55
832-J	Conventional non-Positraction Differential	3.31
833-J	Limited Slip Differential	3.31
835-J	Limited Slip Differential	3.08
845-M	Limited Slip Differential	4.10
852-A	Conventional non-Positraction Differential	3.08
862-B	Conventional non-Positraction Differential	3.55
869B	Limited Slip Differential	3.55
900-A	Conventional non-Positraction Differential	3.08
908-A	Conventional non-Positraction Differential	3.55
909-A	Limited Slip Differential	3.55
930-A	Conventional non-Positraction Differential	3.31
935-C	Limited Slip Differential	3.73
947F	Conventional non-Positraction Differential	4.63
948F	Conventional non-Positraction Differential	5.13
950-A	Conventional non-Positraction Differential	3.08
954-A	Conventional non-Positraction Differential	3.31
956-A	Conventional non-Positraction Differential	3.55
958-A	Conventional non-Positraction Differential	3.73
B4	Limited Slip Differential	3.73
B5	Limited Slip Differential	4.10
B9	Limited Slip Differential	3.55
C1	Limited Slip Differential	3.73
C2	Limited Slip Differential	4.10
C3 (1992-1998)	Limited Slip Differential	3.54
C3 (1999-2002)	Limited Slip Differential	4.30
C4	Limited Slip Differential	3.73
C5	Limited Slip Differential	4.10
C6	Limited Slip Differential	4.56
C9	Limited Slip Differential	3.55
D1	Limited Slip Differential	3.73
D2	Limited Slip Differential	4.10
D3	Limited Slip Differential	4.30
D5	Limited Slip Differential	4.10
D6	Limited Slip Differential	4.56
D403A	Conventional non-Positraction Differential	3.54
D404A	Conventional non-Positraction Differential	3.73
D454A	Limited Slip Differential	3.73
D607A	Conventional non-Positraction Differential	4.10
D615J	Conventional non-Positraction Differential	4.09
D630J	Conventional non-Positraction Differential	3.54
D631A	Conventional non-Positraction Differential	4.10
D632A	Conventional non-Positraction Differential	3.73
D654A	Limited Slip Differential	3.54
D808A	Limited Slip Differential	4.10
E1	Limited Slip Differential	3.73
E2	Limited Slip Differential	4.10
E3	Limited Slip Differential	4.30
E6 (1992-1998)	Limited Slip Differential	4.10
E6 (1999-2002)	Limited Slip Differential	4.56
EW (1992-1999)	Limited Slip Differential	4.10
EW (2000-2002)	Limited Slip Differential	4.88
F1	Limited Slip Differential	3.73
F2	Limited Slip Differential	4.10
F3	Limited Slip Differential	4.30
F5	Limited Slip Differential	4.10
F6	Limited Slip Differential	4.56
F8	Limited Slip Differential	4.88
G3	Limited Slip Differential	4.30
G5	Limited Slip Differential	5.38
G8	Limited Slip Differential	4.88
GW	Limited Slip Differential	4.10
H5	Limited Slip Differential	4.10
H7	Limited Slip Differential	3.31
H8	Limited Slip Differential	3.08
H9	Limited Slip Differential	3.55
K5	Limited Slip Differential	5.38
K8	Limited Slip Differential	4.88
KW	Limited Slip Differential	4.10
W5	Limited Slip Differential	4.00

Thanks Ford. For all that code.

GMC / Chevrolet Axel Codes

RPO is the acronym for “Regular Production Option.” I’ve included some GM codes for front axels too, just in case you need it.

RPO Code	Type	Ratio
F16	Transaxle Final Drive	2.53
F17	Transaxle Final Drive	2.84
F18	Transaxle Final Drive	2.65
F25	Transaxle Final Drive	3.32
F29	Transaxle Final Drive	2.82
F36	Axle Front	2.19
F45	Axle Front	2.93
F47	Axle Front	2.73
F57	Axle Front	3.15
F62	Transaxle Final Drive	2.39
F67	Transaxle Final Drive	3.19
F68	Transaxle Final Drive	3.45
F75	Transaxle Final Drive	3.18
F77	Transaxle Final Drive	3.73
F79	Transaxle Final Drive	2.97
F82	Transaxle Final Drive	3.23
F83	Transaxle Final Drive	3.05
F90	Axle Front	2.73
FA0	Rear	5.77
FA1	Rear 2 Speed	4.88/6.94
FA2	Rear 2 Speed	4.88/6.94
FH5	Transaxle Final Drive	2.81
FH6	Axle Front	3.64
FH7	Transaxle Final Drive	4.12
FH8	Axle Front	2.40
FH9	Transaxle Final Drive	2.60
FJ1	Axle Front	4.18
FJ2	Axle Front	3.74
FJ3	Transaxle Final Drive	3.35
FJ4	Axle Front	4.53
FJ5	Axle Front	4.19
FJ7	Axle Front	4.56
FP0	Transaxle Final Drive	2.55
FP1	Transaxle Final Drive	2.72
FP2	Transaxle Final Drive	3.58
FP3	Transaxle Final Drive	2.73
FP4	Transaxle Final Drive	2.69
FP5	Transaxle Final Drive	2.95
FP6	Transaxle Final Drive	3.54
FP7	Transaxle Final Drive	3.73
FP8	Transaxle Final Drive	3.54
FP9	Transaxle Final Drive	3.54
FQ2	Transaxle Final Drive	3.48
FQ3	Transaxle Final Drive	2.86
FQ4	Transaxle Final Drive	3.57
FQ6	Transaxle Final Drive	4.12
FQ8	Transaxle Final Drive	2.96
FQ9	Transaxle Final Drive	3.21
FR2	Transaxle Final Drive	2.93
FR3	Transaxle Final Drive	3.69
FR6	Transaxle Final Drive	3.84
FR7	Transaxle Final Drive	3.95
FR8	Axle Front	4.17
FR9	Transaxle Final Drive	3.29
FV0	Transaxle Final Drive	3.67
FV1	Transaxle Final Drive	3.72
FV2	Transaxle Final Drive	4.18
FV3	Transaxle Final Drive	3.11
FV4	Transaxle Final Drive	3.71
FV5	Transaxle Final Drive	4.19
FV6	Transaxle Final Drive	4.24
FV7	Transaxle Final Drive	4.29
FV8	Transaxle Final Drive	4.31
FV9	Transaxle Final Drive	4.53
FVO	Transaxle Final Drive	3.67
FW2	Transaxle Final Drive	3.06
FW3	Transaxle Final Drive	4.02
FW4	Transaxle Final Drive	3.89
FW5	Transaxle Final Drive	4.10
FW6	Transaxle Final Drive	3.42
FW7	Transaxle Final Drive	3.83
FW8	Transaxle Final Drive	4.28
FW9	Transaxle Final Drive	3.43
FWS	Transaxle Final Drive	4.10
FX1	Transaxle Final Drive	3.94
FX2	Transaxle Final Drive	2.66
FX4	Transaxle Final Drive	3.35
FX8	Transaxle Final Drive	3.61
FY1	Transaxle Final Drive	2.36
FY3	Transaxle Final Drive	3.79
FY5	Transaxle Final Drive	3.52
G11	Transaxle Final Drive	2.56
G44	Axle Rear	3.07
G72	Axle Rear	2.14
G75	Axle Rear	3.62
G76	Positraction Rear
G80	Axle Positraction, Limited Slip
G81	Positraction Rear Axle
G82	Axle Rear	4.56
G84	Axle Rear	4.10
G86	Axle Rear, Limited Slip
G87	Ring Gear, 8.5″
G89	Ring Gear, 7.5″
G90	Rear	3.15
G91	Special Highway Rear Axle	3.08
G94	Axle Rear	3.31
G96	Axle Rear	3.55
G97	Axle Rear	2.73
GH0	Axle Rear	3.54
GH2	Axle Rear	2.29
GH3	Axle Rear	2.77
GH4	Axle Rear	2.92
GH7	Axle Rear	2.73
GJ1	Axle Rear	5.38
GJ2	Axle Rear	5.13
GK7	Axle Rear	4.78
GK8	Axle Rear	4.33
GK9	Axle Rear	4.63
GL0	Axle Rear	5.13
GL3	Axle Rear	6.17
GM1	Axle Rear	2.59
GM2	Axle Rear	3.44
GM3	Axle Rear	3.45
GM4	Axle Rear	3.67
GM5	Axle Rear	3.89
GM6	Axle Rear	4.22
GM7	Axle Rear	3.68
GM8	Axle Rear	2.56
GN9	Axle Rear	4.11
GS1	Axle Rear	2.73
GS3	Axle Rear	3.73
GS4	Axle Rear	3.70
GS5	Axle Rear	4.11
GS6	Axle Rear	4.56
GS8	Axle Rear	3.94
GT1	Axle Rear	2.56
GT2	Axle Rear	2.29
GT4	Axle Rear (Dup of 5X1)	3.73
GT5	Axle Rear (Dup of GT8)	4.10
GT7	Axle Rear	3.33
GT8	Axle Rear (Dup of GT5)	4.10
GU1	Axle Rear	2.41
GU2	Axle Rear	2.73
GU3	Axle Rear	2.93
GU4	Axle Rear	3.08
GU5	Axle Rear	3.23
GU6	Axle Rear	3.42
GU7	Axle Rear	2.77
GU8	Axle Rear	3.90
GU9	Axle Rear	3.91
GV0	Axle Rear	3.55
GV1	Axle Rear	2.73
GV2	Axle Rear	5.83
GV3	Axle Rear	3.08
GV4	Axle Rear	3.36
GV5	Axle Rear	3.55
GV7	Axle Rear	4.11
GV8	Axle Rear	2.72
GV9	Axle Rear	4.25
GW2	Axle Rear	2.56
GW3	Axle Rear	2.56
GW4	Axle Rear	3.31
GW5	Axle Rear	2.73
GW6	Axle Rear	3.27
GW8	Axle Rear	4.10
GW9	Axle Rear (Dup of GU3)	2.93
GX1	Axle Rear	3.70
GX2	Axle Rear	3.07
GX3	Transaxle Final Drive	3.33
GX4	Axle Rear	3.75
GX5	Axle Rear	4.09
GX6	Axle Rear	3.53
GX8	Transaxle Final Drive	3.74
GY2	Axle Rear	3.31
GY3	Transaxle Final Drive	4.29
GY4	Axle Rear	4.53
GY5	Axle Front	3.65
GY7	Transaxle Final Drive	4.18
GY9	Axle Rear	4.31
GYS	Transaxle Final Drive	3.65
H01	Axle Rear	3.07
H04	Axle Rear, Single Speed	4.11
H05	Axle Rear	3.73
H12	Axle Rear, 21000 Lbs, Eaton 21065S, Single Speed
H42	Axle Rear	6.17
H43	Axle Rear	5.43
HA3	Axle Rear, Single Speed	5.29
HC4	Axle Rear	4.56
HC7	Axle Rear, 7500 Lbs, Single Speed	2.38
HC8	Axle Rear, Single Speed, Truck	3.21
HC9	Axle Rear	5.13
HE3	Axle Rear, 3500 Lbs, Single Speed	3.07
HE4	Axle Rear	3.40
HF7	Axle Rear, 10000 Lbs, Dana 70, Single	4.56
HF8	Axle Rear	4.88
HJ1	Axle Rear	4.55
HJ2	Axle Rear	5.86
HJ3	Axle Rear	4.75
HJ4	Axle Rear	6.50
HJ5	Axle Rear	5.57
HJ6	Axle Rear	4.78
HJ7	Axle Rear	4.88
HK1	Axle Rear	2.87
HK3	Axle Rear	6.14
HK9	Axle Rear 10000 Lbs, Single Spd	5.86
HO4	Axle Rear	4.11
HO6	Axle Rear	4.63

There you have a lot of rear differential axle codes. Hopefully the code you’re looking for it listed above… or it might really grind your gears. Pun intended.

Dodge or Chrysler… sorry, I got nothing for you.

Diffusion

May 20, 2019 | Definitions and Terms

Diffusion

In physics, Diffusion is the net movement of molecules or atoms from an area of higher concentration to an area of lower concentration.

In the building industry and building sciences, we most often use the concept of Diffusion to understand and/or anticipate how water will move through a material or an assembly of materials. Water, often in the physical form of water vapor.

How To Air Seal Your Chimney Flue With A Chimney Balloon

How To Find Your Rear Differential Gear Ratio

Ford Axel Codes and Their Corresponding Information

2004 Ford Super Duty Axle Codes:

2007 Ford Super Duty Axle Codes:

2008 Ford Super Duty Axle Codes:

GMC / Chevrolet Axel Codes

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