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new 7.5 compared to old 7.5 rear

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Old 07-30-2006, 04:20 PM
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Default new 7.5 compared to old 7.5 rear

i have an older elcamino rearend in my chevelle and was wanting to know if gears in my rearend will interchange with a newer fbodys 7.5. im sure the axle splines are probally different but the actual gears if they are similar. open to suggestions
Old 07-30-2006, 06:11 PM
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This might be a dumb question, but what is keeping you from spending $120 on a set of new gears in the ratio of your choice? If you're going to do it, do it right, not with a 30 year old gear set....
Old 07-30-2006, 06:59 PM
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The old gears will work even if they have 7.5 stamped on them and the new ones had 7.625 stamped on them.
I'd rather use those than a set of $120 new gears, where do you find gears for $120?
Old 07-30-2006, 10:56 PM
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eBay.
Old 07-31-2006, 01:54 AM
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Originally Posted by lt170chevelle
i have an older elcamino rearend in my chevelle and was wanting to know if gears in my rearend will interchange with a newer fbodys 7.5. im sure the axle splines are probally different but the actual gears if they are similar. open to suggestions
Let me get this right. You have a late model Elco 7.5 in your 70 Chevelle ?? Wow. Never would have seen that comming.... If this is the case, then yes, the late model 7.5/7.625 gears will work as Kelly stated.


Originally Posted by keliente
.......not with a 30 year old gear set....
And Kelly....... what's wrong with gears that are 30 years old ?? I have 39 year old gears in my 12 bolt.

Damn twentysomethings'.
Old 07-31-2006, 05:26 AM
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If this is the case, then yes, the late model 7.5/7.625 gears will work as Kelly stated.
I said that. I'm not Kelly.
Old 07-31-2006, 09:03 AM
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Originally Posted by chicane

And Kelly....... what's wrong with gears that are 30 years old ?? I have 39 year old gears in my 12 bolt.

Damn twentysomethings'.


Just saying if you are going through the trouble of setting up a ring and pinion, might as well make the install as reliable as possible
Old 07-31-2006, 09:03 AM
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Originally Posted by 8a8mfh
I said that. I'm not Kelly.
You wanna fight about it?

Old 07-31-2006, 10:53 AM
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Originally Posted by keliente


Just saying if you are going through the trouble of setting up a ring and pinion, might as well make the install as reliable as possible
Well I wouldn't get them off e-bay then. So if you got a new set from a vendor on here its more like $200.
Old 07-31-2006, 11:04 AM
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Originally Posted by BIG_MIKE2005
Well I wouldn't get them off e-bay then. So if you got a new set from a vendor on here its more like $200.
Brand new motives are brand new motives no matter where they come from
Old 07-31-2006, 11:42 AM
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I wouldn't trust anyone on e-bay. Way to many people gettin ripped off now days. It might say new gears & then you get a rock in a box delivered or some worn out gears. Not worth rollin the dice to me. If you gonna spend the money don't cheap out, just get them from a 100% reliable source.
Old 07-31-2006, 02:57 PM
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Originally Posted by 8a8mfh
I said that. I'm not Kelly.



Ok, but dont call me Sherly.
Old 07-31-2006, 03:32 PM
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Originally Posted by chicane



Ok, but dont call me Sherly.
Fricken senile old people around here....





Old 07-31-2006, 03:50 PM
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Originally Posted by keliente
Fricken senile old people around here....
Does 14 years senior qualify for old ?? Remember, gray is actually a refinement.
Old 07-31-2006, 03:53 PM
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Originally Posted by chicane
Does 14 years senior qualify for old ?? Remember, gray is actually a refinement.
Better gray than none at all. That's what my dad says
Old 07-31-2006, 04:43 PM
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Originally Posted by keliente
You wanna fight about it?

Yeah, you and Sherly both
Old 07-31-2006, 05:24 PM
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yes i am running a newer elky rearend in my 70 chevelle. im on a budget and know some people that might have some used ones layin around out of a newer fbody
Old 07-31-2006, 06:50 PM
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There are tons of S10's and S10 blazers in junkyards with 3.73 7.5/7.625 rears, you could maybe get a set from there.
Old 08-03-2006, 03:49 PM
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oh yeah..i forgot about the s10's and blazers...cool thanks for bringing that up..i might go that route..i still havent opened it up yet but im pretty sure i snapped the pinion
Old 08-07-2006, 06:33 AM
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I have done a couple gear swaps using Richmond, Motive and stock used gears from another F-body. The Richmonds always make noise, the Motives did a little bit but, the used stock GM gears were as quiet as the car they came out of. And I was always able to use the stock shims over again and hit the gear pattern and backlash dead on everytime. Nothing wrong with old, used gears.



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