speedo gear

redrider · 01-17-2002, 08:48 AM

I am trying to find out my true speed on the highway. I scrapped 2 Lentech AOD's in favor of a racing C4. I had a 4.10 gear with the AOD and the shop said thet put in the speedo gear that was white which would correspond to the right rear gear. I then broke the second Lentech street terminator + and got the C4 with 3.55 gears. Cann any one tell me what color speedo gear is for that gear and can you tell if the ring gear is a 3.55 by counting the number of teeth. My car now records 3500 rpm at 80 mph with the latest combo. I don't think the shop swapped out the 4.10 for the 3.55. What do you think?

Thanks 4 the help

PKRWUD · 01-17-2002, 10:06 PM

The correct color for 3.55's in an auto trans is:

w/15" rims: Orange w/20 teeth

w/ 16" rims: Tan w/19 teeth

The final drive ratio is determined by counting the number of teeth on the ring gear and divide by the number of teeth on the pinion gear. I don't know off the top what the count is.

Take care,
-Chris

01-17-2002, 08:48 AM	#1
redrider Registered Member Join Date: Apr 1999 Location: seffner, Florida, usa Posts: 95	speedo gear I am trying to find out my true speed on the highway. I scrapped 2 Lentech AOD's in favor of a racing C4. I had a 4.10 gear with the AOD and the shop said thet put in the speedo gear that was white which would correspond to the right rear gear. I then broke the second Lentech street terminator + and got the C4 with 3.55 gears. Cann any one tell me what color speedo gear is for that gear and can you tell if the ring gear is a 3.55 by counting the number of teeth. My car now records 3500 rpm at 80 mph with the latest combo. I don't think the shop swapped out the 4.10 for the 3.55. What do you think? Thanks 4 the help __________________ 88 GT mass air conversion from 90lx, Cobra Intake(ported/polished lower),Edlebrock Aluminum Heads(ported/polished),38# injectors 70 mm BBK TB, 77mm Pro M, Coast High 347 SB, Wolverine custom cam, Vortech T Trim w power pipe(13lbs), fmu & boost retard, 255lb fuel pump (BBK off road H pipe, Dynomax cat back, alum driveshaft w safety loop, Konis,Southside Bars w chromemoly torque boxes,AOD w lentech valve body, B&M MegaShifter, 4.10 with True Track locker, SVO springs, subs, cross drilled rotors, Nitto Drag Radials,MSD A6, black magic fan etc.

01-17-2002, 10:06 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	The correct color for 3.55's in an auto trans is: w/15" rims: Orange w/20 teeth w/ 16" rims: Tan w/19 teeth The final drive ratio is determined by counting the number of teeth on the ring gear and divide by the number of teeth on the pinion gear. I don't know off the top what the count is. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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