What rear gear ration would this truck have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dfrank · 09-25-2014, 07:46 PM

We have a 94 Chevy cheyenne 1500 long bed 2wd with a 4.3l and 5 speed manual transmission. It is completely stock. At 70mph on the highway it is running at 1900rpm. What would the estimated gear ratio be that came with this truck? The truck gets almost 25mpg. Thanks!

**Boog** · 09-25-2014, 09:56 PM

I'd bet it's a 3.42 gear with the stock sized tires.

**Already Gone** · 09-26-2014, 05:05 AM

Look in your glove box at the spid label. It wil have the codes for everything onyour truck when it was built. If it has the code GU4 it has 3:08's, GU6 its a 3:42, and GT4 is 3:73's. If the code G80 is there as well then you have positraction.

wjjeeper · 09-26-2014, 05:43 PM

Quote:

Originally Posted by Already Gone

Look in your glove box at the spid label. It wil have the codes for everything onyour truck when it was built. If it has the code GU4 it has 3:08's, GU6 its a 3:42, and GT4 is 3:73's. If the code G80 is there as well then you have positraction.

Do you have a link for 88-98 codes?

b454rat · 09-26-2014, 05:52 PM

They are the same as the older trucks too. Google RPO codes...

wjjeeper · 09-26-2014, 05:55 PM

Quote:

Originally Posted by b454rat

They are the same as the older trucks too. Google RPO codes...

Oh. Well then I got those in the shop.......

dfrank · 09-26-2014, 07:09 PM

Quote:

Originally Posted by Already Gone

Look in your glove box at the spid label. It wil have the codes for everything onyour truck when it was built. If it has the code GU4 it has 3:08's, GU6 its a 3:42, and GT4 is 3:73's. If the code G80 is there as well then you have positraction.

I just checked today. It has GU6 so it has 3.42 gears. No G80 so no posi. Thanks!

**Already Gone** · 09-26-2014, 07:44 PM

A 3:42 ratio with the V6 and 5 speed is ideal. You will have decent power and good gas mileage.

dfrank · 09-26-2014, 08:54 PM

Quote:

Originally Posted by Already Gone

A 3:42 ratio with the V6 and 5 speed is ideal. You will have decent power and good gas mileage.

It has decent power once it gets to 3500rpm - 5000rpm. Not much though. It sure aint like my 86 k10 with 383 stroker and 4.10's

95 S_Trucker · 09-27-2014, 11:41 AM

These trucks don't have posi, it would be a locking differential.

b454rat · 09-27-2014, 05:05 PM

Quote:

Originally Posted by 95 S_Trucker

These trucks don't have posi, it would be a locking differential.

AKA "grenade locks"

09-25-2014, 07:46 PM	#1
dfrank Registered User Join Date: Aug 2014 Location: Pittsburgh, PA Posts: 627	What rear gear ration would this truck have? We have a 94 Chevy cheyenne 1500 long bed 2wd with a 4.3l and 5 speed manual transmission. It is completely stock. At 70mph on the highway it is running at 1900rpm. What would the estimated gear ratio be that came with this truck? The truck gets almost 25mpg. Thanks!

09-25-2014, 09:56 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 14,116	Re: What rear gear ration would this truck have? I'd bet it's a 3.42 gear with the stock sized tires. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver 'primer is finer' Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

09-26-2014, 05:05 AM	#3
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,231	Re: What rear gear ration would this truck have? Look in your glove box at the spid label. It wil have the codes for everything onyour truck when it was built. If it has the code GU4 it has 3:08's, GU6 its a 3:42, and GT4 is 3:73's. If the code G80 is there as well then you have positraction. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " In the end, we only regret the chances we didnt take " " Time is the only currency we spend without knowing the balance, use it wisely ." ..

09-26-2014, 05:52 PM	#5
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,485	Re: What rear gear ration would this truck have? They are the same as the older trucks too. Google RPO codes... __________________ 2000 Chevy Tahoe Limited 3/5" drop 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon stock SAS 6"

09-26-2014, 07:44 PM	#8
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,231	Re: What rear gear ration would this truck have? A 3:42 ratio with the V6 and 5 speed is ideal. You will have decent power and good gas mileage. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " In the end, we only regret the chances we didnt take " " Time is the only currency we spend without knowing the balance, use it wisely ." ..

09-27-2014, 11:41 AM	#10
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,187	Re: What rear gear ration would this truck have? These trucks don't have posi, it would be a locking differential.



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