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im planing on getting my rear end gear ratio changed to 3.73!! do i have to calibrate my speedo right away, if not will my transmisson shift early or later. or will it even get affected. its an 89 camaro 305 tbi with a auto 700r4 trans. thanks guys
(Im just worried about my shifting. not my speed. )
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89 Camaro, LS1/4L60E, Shift Kit, Vig 3500 Stall, Air ride suspension, BMW E36 head Lights, LS6 intake, 99 Camaro cluster, 3" DMH cutout, Hawks 1 3/4 L/T, 160* T-Stat, 4th Gen Cluster, Flow master Y, 4th Gen A/C, SFC, Spohn Lower control arms, Custom Spohn TQ Arm,
Your speedo will be off about 37% 3.73/2.73=1.366. So if your speedo reads 60mph your really on going 43 mph. To do 60mph your speedo will need to read 82mph.
__________________ LT1 headed LG4 305 beast! Comp Solid lifter XS-262-10S, 1.6 Roller Rockers, 10.2:1, Holley 4160 600cfm, modded Weiand 7502 intake to fit LT1 heads____ Custom cylinder head cooling. Weiand 8208 Short Water Pump____TH-350 3 series 3.73 with 2 series posi and spacer____ Hedman Hedders 1 5/8 headers and Y-pipe 3in Exhaust, Dynomax 3" Bullet muffler ____Moroso Ultra 40 Wires ACCEL HEI Super Coil ____Competition Engineering 3120 Bolt-on SFC's____Homemade: Wonderbar, solid tie rod sleeves, Aluminum LCA and Panhard Rod with spherical rod ends, alternator and PS bracket, Strut tower brace, and Decoupling torque arm with telescoping link.
3000lbs
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Your speedo will be out of whack by a lot though... but it shouldn't effect your tranny. 
