 Old Chevy Soldier
Gold Supporting Member
Posts: 52
Loc: Central Montana
Reg: 03-12-12
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06-15-12 06:42 PM - Post#2237619
Hello Gentlemen (and Ladies),
I am working on a 41 chevy. One of the popular drive train conversions is to a SBC-700R4-S10 Diff. I was told that it is possible to detemine the diff. ratio by using a code that is on a label in the glove box or on a tag on the diff. Can anyone explain more clearly the location of the codes and how to translate?
| Life is to short to ride an ugly horse or drive a Ford |
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 gchemist
Senior Chevytalk Moderator
Posts: 20830
Loc: Austin, TX 78748
Reg: 05-09-00
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06-15-12 09:18 PM - Post#2237671
In response to Old Chevy Soldier
Yes, using the glove box RPO codes. You can determine gear ratios. The most common ratio is 3.42. Do you. have the codes?
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS |
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Old Chevy Soldier
Gold Supporting Member
Posts: 52
Loc: Central Montana
Reg: 03-12-12
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06-16-12 01:04 AM - Post#2237715
In response to gchemist
gchemist,
Thanks for the response. No, I do not have the codes. I would also like to know if the S10 has the 5 on 4 3/4 lug pattern.
| Life is to short to ride an ugly horse or drive a Ford |
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65327
Forum Newbie
Posts: 24
Loc: ohio
Reg: 05-13-12
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06-16-12 05:14 AM - Post#2237741
In response to Old Chevy Soldier
One way to check ratios is to jack up the car and put the trans in its highest gear for a 1.1 ratio, turn both rear tires one full rotation at the same time and count how many times your driveshaft turns. It,s not exact but real close.
3 1/2 turns would be around a 350 gear and so fourth. It works!
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 Chevytech
Subject Matter Expert - Senior Member
Posts: 2695
Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
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06-16-12 07:51 AM - Post#2237787
In response to Old Chevy Soldier
Axle ratio by RPO code on the sticker in the glove box.
GM1 = 2.59
GU2 = 2.73
HC2 = 2.76
HE3 /G44 = 3.07
GU4 = 3.08
GU5 = 3.23
GU6 = 3.42
GT4 = 3.73
GT5/GT8 = 4.10
HC4 = 4.56
For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If the it has been altered from stock let us know about that too. |
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SleeperSS
Senior Member
Posts: 1820
Loc: Spanaway, Wa
Reg: 10-17-04
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06-16-12 09:24 AM - Post#2237808
In response to Chevytech
As a side note, G80 is the much maligned Posi/Gov-Loc. Mine is still going strong at 239K.
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Old Chevy Soldier
Gold Supporting Member
Posts: 52
Loc: Central Montana
Reg: 03-12-12
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06-16-12 05:56 PM - Post#2237984
In response to SleeperSS
65327,Chevytech, SleeperSS,
Thank you for the responses. I think I have enough information to proceed.
| Life is to short to ride an ugly horse or drive a Ford |
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gchemist
Senior Chevytalk Moderator
Posts: 20830
Loc: Austin, TX 78748
Reg: 05-09-00
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06-17-12 04:36 AM - Post#2238133
In response to Old Chevy Soldier
Since you probably have to change the oil in it, look for a stamp on the ring. It will have the number of teeth stamped on it.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS |
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