7-5/8" Rear Interchange Questions
Thread Starter
Registered User
Joined: Nov 2003
Posts: 570
From: NC
7-5/8" Rear Interchange Questions
Got a few questions for those poe foke among us who are forced to live with our 10-bolts until Santa gets here...
1) Are all 3rd and 4th gen F-bodies the 7-5/8" ring gear? Did they ever have the 7.5"?
2) Do all 7-5/8" rears have the same axle splines? For example, if I get a 99 S10 center section will the spiders have the same splines as an 89 Camaro axle?
3) When did they stop making the 7-5/8"? Did they ever stop? Please tell me they stopped that. What do new Trailblazers use? I have to think an LS-engined Trailblazer SS would eat one a day?
Just trying to figure out what all GM models of vehicles to scavenge for parts.
1) Are all 3rd and 4th gen F-bodies the 7-5/8" ring gear? Did they ever have the 7.5"?
2) Do all 7-5/8" rears have the same axle splines? For example, if I get a 99 S10 center section will the spiders have the same splines as an 89 Camaro axle?
3) When did they stop making the 7-5/8"? Did they ever stop? Please tell me they stopped that. What do new Trailblazers use? I have to think an LS-engined Trailblazer SS would eat one a day?
Just trying to figure out what all GM models of vehicles to scavenge for parts.
Registered User
Joined: Jul 2005
Posts: 424
From: Euclid,Ohio
Re: 7-5/8" Rear Interchange Questions
the 7.5/7.625 designations ONLY apply to the gearset.
7.5 is the same as 7.625.
a 7.625 rearend has a 7.625 OD ring gear mounted on a 7.5 carrier.
a 7.5 rearend has a 7.5 OD ring gear mounted on a 7.5 carrier.
rearend parts are the same: bearings,seals,shims,etc.
they might have gone to the 7.625 gear in 1994,not sure.
older splines were 26,think that ended in 1988,not sure.
Go to some rearend sites,like Richmond,Motive-lot of interchange info.
7.5 is the same as 7.625.
a 7.625 rearend has a 7.625 OD ring gear mounted on a 7.5 carrier.
a 7.5 rearend has a 7.5 OD ring gear mounted on a 7.5 carrier.
rearend parts are the same: bearings,seals,shims,etc.
they might have gone to the 7.625 gear in 1994,not sure.
older splines were 26,think that ended in 1988,not sure.
Go to some rearend sites,like Richmond,Motive-lot of interchange info.
Thread Starter
Registered User
Joined: Nov 2003
Posts: 570
From: NC
Re: 7-5/8" Rear Interchange Questions
the 7.5/7.625 designations ONLY apply to the gearset.
7.5 is the same as 7.625.
a 7.625 rearend has a 7.625 OD ring gear mounted on a 7.5 carrier.
a 7.5 rearend has a 7.5 OD ring gear mounted on a 7.5 carrier.
rearend parts are the same: bearings,seals,shims,etc.
they might have gone to the 7.625 gear in 1994,not sure.
older splines were 26,think that ended in 1988,not sure.
Go to some rearend sites,like Richmond,Motive-lot of interchange info.
7.5 is the same as 7.625.
a 7.625 rearend has a 7.625 OD ring gear mounted on a 7.5 carrier.
a 7.5 rearend has a 7.5 OD ring gear mounted on a 7.5 carrier.
rearend parts are the same: bearings,seals,shims,etc.
they might have gone to the 7.625 gear in 1994,not sure.
older splines were 26,think that ended in 1988,not sure.
Go to some rearend sites,like Richmond,Motive-lot of interchange info.
Thread Starter
Registered User
Joined: Nov 2003
Posts: 570
From: NC
Re: 7-5/8" Rear Interchange Questions
Looks like generally speaking 1978-2002 pretty much is universal for 7.5 and 7.625" components.
However, I do see some hints that the 2002 Trailblazer may have had a different unit, so I'd only rely on up to 2001 to be sure.
However, I do see some hints that the 2002 Trailblazer may have had a different unit, so I'd only rely on up to 2001 to be sure.
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