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Old 02-06-2007, 06:19 PM   #20
Captkaos
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Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
Re: Rear End Id, Tranny Id?

Quote:
Originally Posted by swervin ervin View Post
TUM is a 2.73 ratio. Standard rear axle only means what GM considered standard for each year, or something close to that anyway. Somebody explained this before in great detail. I just can't remember who it was. 2.73 was standard in 85 also.
I believe it was 73-87 Dictionary KIILew. I forgot you had the axle codes Mike...
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1978 GMC Jimmy (2WD) - SOLD
1987 R10 twin turbo LS
1991 R3500 SRW CrewCab
1985 K5 diesel swapped project
1989 K5 2WD conversion w/ Vette susp Project
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