Discussion in 'The Garage' started by SUPERSUB87, Apr 22, 2007.
what were the stock gear ratios for an 88 suburban???
Depends on the year, but for the most part 3.73 4.11 or 4.56.....
check the RPO codes in the glovebox, or pull the cover and count teeth.
Agreed! You can check your RPO codes here and I would suggest bookmarking it. http://www.wiu.edu/users/muwtj1/rpocodes.htm
thanks for the link. ill check right now.
If they are stock axles then the front is a 10 bolt not a Dana 44.
Here are the codes you need to look for I have also seen the tag on the fenderwells before.
GT4 AXLE REAR,3.73 RATIO (DUP WITH 5X1)
GT5 AXLE REAR,4.10 RATIO (DUP WITH GTS)
GT7 AXLE REAR,3.33 RATIO
GT8 AXLE REAR,4.10 RATIO (DUP WITH GT5)
GU2 AXLE REAR,2.73 RATIO
GU4 AXLE REAR,3.08 RATIO
GU5 AXLE REAR,3.23 RATIO
GU6 AXLE REAR,3.42 RATIO
GV2 AXLE REAR,5.83 RATIO
GWL SPRING REAR,9000 LBS CAPACITY
GW6 AXLE REAR,3.27 RATIO
GW9 AXLE REAR,2.93 RATIO (DUP WITH GU3)
GX3 RATIO, TRAN SAXLE FINAL DRIVE 3.33
G44 AXLE REAR,3.07 RATIO
G50 SPRING REAR,HEAVY DUTY, VAR 1
G51 SPRING REAR,HEAVY DUTY, VAR 2
G52 SPRING,RR, 15000 LBS
G60 SPRING REAR,AUXILIARY
G66 LEVEL CONTROL,MAN, AIR
G67 LEVEL CONTROL,AUTO, AIR
G69 LEVEL CONTROL,AUTO, AIR, HD
G80 AXLE POSITRACTION,LIMITED SLIP
G87 AING GEAR,8.50 INCH
G92 AXLE REAR RATIO,PERFORMANCE
G95 AXLE REAR RATIO,ECONOMY
ok so it says 3.42. would that be ok for 37's? and it also says that i have a positraction, limited slip in the rear 14b. Is that like the gov lock?? the pumpkin of the 14b looks like a 10.5" ring gear. are those common?
Yep that's the infamous gov-loc. You can run it, but it'll be a dog. Here's a link to figure what RPM you'll be running http://www.4lo.com/calc/geartable.htm
or this is more consise
just solve for RPM.
Are you sure that's a 3/4ton?
positive. its a silverado package. the rear is a 14 bolt, it has the quad shocks. It also had the load arm on the rear axle. oh and its a 8-lug.
It says that the rpms will be running at about 2019. thats pretty weak isnt it?
Wow, never heard of a 3/4ton w/ 3.42. I thought I had it bad w/3.73s.
gee. thanks. with how much money ive put into this thing you would think i would get a break somewhere along the lines. but no. at least its a sexy
oh, one other thing. the rear looks like a 14bff(10.5), the casting number on the web is 15? what does that mean.
Have you posted some pics of your beast somewhere? I wanna see.
ill do it this week. been meaning to. havent put the body lift on so it's to it's true height yet. the lift right now is 6" with some 37x13.50 nitto mudgrapplers on 18" procomps. (a little bling, still in high school). spent just about every penny ive earned on it 2.
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