80 mph cluster upgrade to the 120 mph cluster

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Apr 17, 2006 | 10:05 AM

ntrow99

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Joined: Mar 2002

Posts: 9

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From: Cleveland Ohio

80 mph cluster upgrade to the 120 mph cluster

Question. I was lucky enough to find a 120 mph cluster to replace my stock 80 mph im my 86 IROC Z.

Wish I could find the 145 mph cluster. The real question is when I upgrade to either cluster do I have to change anything in the transmition? like a speedo sensor? or gearing?

Thanks?

Apr 17, 2006 | 03:45 PM

krisb410

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iTrader: (9)

Joined: Nov 2005

Posts: 2,346

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From: Naples, FL

Car: 91 RS Camaro, 75 L82 Corvette

Engine: LO3, 383 Stroker

Transmission: 700R4, TH400

Axle/Gears: 4th gen 3.23 posi/LS1 discs, stock

https://www.thirdgen.org/gauges

Apr 17, 2006 | 10:51 PM

BanditMan

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Joined: Sep 2005

Posts: 98

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From: Middle Tennessee

Car: 84 trans am

Engine: 305 H.O. with small cam

Transmission: th350 with manual valvebody

Axle/Gears: 3:73's

I would also like to do this, but i have an 84' ta. Can you swap in a cluster from a tpi equpied car to a carbed car? It has the stock full guages already, but im tired of that old 80 mph speedo, i wanna see when im doin 120!!