TCI Speedo Chart Down: Need gear for 3.27 change

Reply Subscribe

Thread Tools

Search this Thread

Oct 2, 2008 | 04:05 PM

neagan

Thread Starter

Supreme Member

iTrader: (7)

Joined: Jan 2006

Posts: 1,160

Likes: 1

From: Santa Rosa, Cali

Car: 1988 IROC 5.7 Money Pit

Engine: (being built; modified TPI ZZ4

Transmission: 2200 stall/ stage 3 700R4

Axle/Gears: freshened 3.27 in 9.bolt/

TCI Speedo Chart Down: Need gear for 3.27 change

I spent the last couple hours+ searching our site for a direct answer. I switched my 9-bolt 2.77 highway gears to the 3.27 set/700r4. I have an 88' IROC with the speedo cable and just want to know what color gear(s) exactly I need to change. I found lots of 'how-to's' but I must be thick brained.

The TCIAUTO.com calculator site is down/don't know if it's a permanent thing?

Can you help a mentally retarded member please?

Nitro-Nicky

Oct 2, 2008 | 04:38 PM

Lo-tec

TGO Supporter

Joined: Jan 2005

Posts: 1,768

Likes: 2

From: Gambrills, Md

Car: clapped out 84Z

Engine: 355 efi roller

Transmission: tremec TKO

Re: TCI Speedo Chart Down: Need gear for 3.27 change

You need a lt blue 45 tooth gear.

Oct 2, 2008 | 08:46 PM

Nasty-Z

Junior Member

Joined: Oct 2007

Posts: 23

Likes: 0

From: Poconos P.A.

Car: 1980 Z-28 /1992 S-10

Engine: 496 /421 Stroker

Transmission: 700R4 / Tremec

Axle/Gears: 4.88 / 4.30

Re: TCI Speedo Chart Down: Need gear for 3.27 change

It's back up right now

With a 17 tooth drive gear and a 25" tall tire the lt blue gear mentioned should work O.K.

http://tciauto.com/Products/Componen...eter_gears.asp

TOM

Last edited by Nasty-Z; Oct 2, 2008 at 08:51 PM.

Oct 2, 2008 | 09:37 PM

neagan

Thread Starter

Supreme Member

iTrader: (7)

Joined: Jan 2006

Posts: 1,160

Likes: 1

From: Santa Rosa, Cali

Car: 1988 IROC 5.7 Money Pit

Engine: (being built; modified TPI ZZ4

Transmission: 2200 stall/ stage 3 700R4

Axle/Gears: freshened 3.27 in 9.bolt/

Re: TCI Speedo Chart Down: Need gear for 3.27 change

Thanks for pitching an answer in guys; I'm just ready to pull the driveshaft for a balance and a new set of U-joints and I was tearing my hair out looking for an answer. Interestingly, the shop that did the Stage III trany build just didn't seem to know what speedo gear was correct. That's when I knew I was in deep trouble....... Ouch! Nitro-Nicky