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Fluid capacity of 91 7.5" diff

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Old Jan 5, 2004 | 09:25 PM
  #1  
Scarebird's Avatar
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From: ABQ, NM, USA
Car: 1998 Z28 convertible
Engine: LS1
Transmission: 700-R4
Axle/Gears: 3.23
Fluid capacity of 91 7.5" diff

Either my shop manual is missing the page, or simply does not have it- but what is the fluid capacity of this diff? I have installed the SLP Torsen takeoff with some 3.42 gears out of an S-10, and want to add the gear oil while the cover is off and diff is sitting on sawhorses...
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Old Jan 5, 2004 | 11:51 PM
  #2  
MdFormula350's Avatar
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From: Maryland; USA
fluid type 80W or 80W-90

add 4 ounces of limited slip diff additive


3.5 pints is capacity according to my book.
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Old Jan 6, 2004 | 02:03 AM
  #3  
Scarebird's Avatar
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From: ABQ, NM, USA
Car: 1998 Z28 convertible
Engine: LS1
Transmission: 700-R4
Axle/Gears: 3.23
Gracias
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Old Jan 6, 2004 | 06:05 AM
  #4  
ede's Avatar
ede
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From: Jackson County
just fill it untill it starts to run out the fill hole.
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Old Jan 6, 2004 | 11:32 AM
  #5  
Scarebird's Avatar
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From: ABQ, NM, USA
Car: 1998 Z28 convertible
Engine: LS1
Transmission: 700-R4
Axle/Gears: 3.23
ede, thanks for the help, but I already knew that (even have a pump for it...). It is much easier to fill a diff on the bench with the cover off.
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Old Jan 10, 2004 | 12:24 PM
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johnjm22's Avatar
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From: Barstow, CA
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: WC T-5
Axle/Gears: 3.73
What year s-10 did you get those 3.42 gears out of? I have a 91 with stock 3.08 and am looking to upgrade.
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Old Jan 10, 2004 | 01:37 PM
  #7  
Scarebird's Avatar
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Joined: Jul 1999
Posts: 77
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From: ABQ, NM, USA
Car: 1998 Z28 convertible
Engine: LS1
Transmission: 700-R4
Axle/Gears: 3.23
You need to get a numerically larger carrier to run 3.42 and up gears; you're 3.08 won't do it. Also, check on the splinecount, either 26 (1982-89)or 28 (1990-2003) S-10's, especially manual 4 cylinders are excellent sources of 3.73 and 4.11's.

Last edited by Scarebird; Jan 10, 2004 at 01:41 PM.
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