Identifying gear ration
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- 1986 CJ7, SBC 350, Dana 300, D30, AMC20
Identifying gear ration
- Thread starter Masscj7
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RiverandSand
Senior Jeeper
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- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
IF it's still the OEM ratio-Most likly 2:73 or 3:31.
Pull the diff cover-The ring gear will have it stamped on it.
You sure your rear axle is not a '44'? Many '86s were.
LG
Pull the diff cover-The ring gear will have it stamped on it.
You sure your rear axle is not a '44'? Many '86s were.
LG
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He was talking about the front.
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- 1986 CJ7, SBC 350, Dana 300, D30, AMC20
Lumpy, I wish I had a 44, but unfortunately I have a 20.
But was talking about the front. I did find these markings on it this evening.
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But was talking about the front. I did find these markings on it this evening.
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coldair
Full Time Jeeper
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1996 F350 crew cab with a 5.9 cummins
Lumpy, I wish I had a 44, but unfortunately I have a 20.
But was talking about the front. I did find these markings on it this evening.
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Your Jeep has 2.73 gears
jp360cj
Old Time Jeeper
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Yep, 49/18= 2.72s
When doing the tire to driveshaft rotation on an open diff, you need to make sure both tires are turning at the same speed. Best way is to roll the tires across the ground. If only 1 tire (or axle shaft) turns, you need to do 2 complete tire rotations. I learned that the hard way after a buddy passed up what turned out to be 3.54 WT axles because we couldn't figure out the ratio
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When doing the tire to driveshaft rotation on an open diff, you need to make sure both tires are turning at the same speed. Best way is to roll the tires across the ground. If only 1 tire (or axle shaft) turns, you need to do 2 complete tire rotations. I learned that the hard way after a buddy passed up what turned out to be 3.54 WT axles because we couldn't figure out the ratio
Sent from my iPhone using Tapatalk
- Posts
- 14,772
- Thanks
- 43
- Location
- Springfield, Missouri-U.S.A. Earth
- Vehicle(s)
- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
2:73 ratio.Copy on the '20'-I have seen many who 'thought' they had a '20', when in fact it was a '44'..........
LG