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Old 11-24-2020, 12:26 PM
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CROCIE JR CROCIE JR is offline
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Default New 3.73 on 3.23 carrier?

Customer wants 3.73 gears in his 65 BOP 8.2 Vista Cruiser. He does not want to put a new posi in it. What are my options? Currently has 3.23.

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Old 11-24-2020, 12:54 PM
Steve C. Steve C. is offline
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Found this...

https://www.differentials.com/gm-8-2...rential-parts/


.

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Old 11-24-2020, 12:57 PM
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https://www.randysworldwide.com/reso...arrier-breaks/ You will have to change carriers for a 3.73 gear.

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Old 11-24-2020, 02:50 PM
KEN CROCIE KEN CROCIE is online now
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you cudda asked dad

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Old 11-24-2020, 03:08 PM
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OUCH! That had to hurt.

LOL! Happy Holidays to Ken and Crocie Jr.

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Old 11-24-2020, 03:18 PM
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Quote:
Originally Posted by CROCIE JR View Post
Customer wants 3.73 gears in his 65 BOP 8.2 Vista Cruiser. He does not want to put a new posi in it. What are my options? Currently has 3.23.
Type > BOP 8.2 rear gear spacer < into your search bar.

Stan

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Old 11-24-2020, 05:50 PM
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You need a 3.36--4.33 carrier to do it without a spacer. An 8.2 is weak enough as it is, so I would either find the right carrier, or upgrade to a later 8.5 rear end.

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Old 11-24-2020, 07:07 PM
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Ken you know parents never know anything!

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Old 11-24-2020, 10:54 PM
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Unfortunately the 8.2 isn't popular enough for the aftermarket to make thick ring gears for the 3.23 and down carriers. That would be the easiest but as far as I know they aren't out there for this application.

You'll either have to add a spacer for the ring gear, or buy a new carrier for 3.36 and up gears.

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Old 11-25-2020, 02:17 PM
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Thanks Tom! Happy Holidays to you and yours.

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Old 11-25-2020, 02:41 PM
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I've seen an early Vista Cruiser rear and it looked stronger than the regular BOP 8.2 rears, can't remember if it had better axles.

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Old 11-26-2020, 07:59 PM
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The way the BOP carriers are designed, you need a NEGATIVE spacer to install a3.36 and up on a 3.23 and down carrier. I researched that 40 years ago for an article I was writing, and as a possible new part to sell for H-O Racing,

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Old 11-26-2020, 10:17 PM
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I bet those "Negative Spacers", LOL, are not cheap and hard to find too.

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Old 11-30-2020, 01:16 PM
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Dad was right the whole time! Cant seem to find the Negative spacer anywhere!

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Old 11-30-2020, 01:29 PM
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Time to swap in a 4 pinion 3.23 to 4.33 Limited Slip Differential into the housing, right.
Practically every one of the TRI-POWER GTOs had a 3.23 (most likely 3.55 gear
LSD unit in them, most were a 2 pinion one.

Tom V.

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Old 11-30-2020, 03:57 PM
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Quote:
Originally Posted by Tom Vaught View Post
Time to swap in a 4 pinion 3.23 to 4.33 Limited Slip Differential into the housing, right.
Practically every one of the TRI-POWER GTOs had a 3.23 (most likely 3.55 gear
LSD unit in them, most were a 2 pinion one.

Tom V.
All due respect, this is incorrect. The range goes like this for the original 8.2 in these A body cars: 2:56- 2:78 share a carrier, 2.93-3.08-3.23 share the same carrier, and 3.36-3.55-3.90-4.33 share the same carrier. Every original Tripower GTO I have seen with a stick had a 3.55 in it. In fact, in 45 years, haven't seen a real TP car with a 3.23 rear end...ever. Not saying they weren't built, but saying that almost every one of them came with a 3.23 has not been my experience on this planet.

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