Chevy 283 v8 from ’57 vette
Square bore carb F121EF -date code stamp
(flint plant produced)
(month January)
(day 21)
RPOFYCIDapplVINHPBBLS Body/CommentsEF 1957283 m/t, 3 spd 220 4 VetteEF 1958283 turglide, air susp.- 4 full size/12003737739 - serial casting stamp
Year csting c.i. low hp hgh hp caps application
1957-59 3737739 283220 2902car, truck3746829 - manifold stamp
YearsCastingCIDbblsMaterialCarbApplication1958-613746829283 4iron WCFB, QjetB Y/230hpT90a-1 4 4-15 FeaturesThe T90 is a top loaded, top shifting or side shifting transmission.
The T90 is fully synchronized in the second and third gears. All gears are helically cut except first and reverse, which are spur gears. IdentificationThe T90 transmission is 9" long and features a cast iron top cover that is retained by six bolts and a main case of cast iron. The case itself has a prominent bulge on the driver's side with two protruding bosses as provisions for side-shifting actuators.
All T90 transmissions have a 1-3/8" x 6 spline output shaft for mounting the transfer case input gear.
Jeeps also had a T86 transmission http://www.novak-adapt.com/knowledge/t86.htm that appears similar to the T90. Many parts interchange, however first & reverse gears are helically cut in the T86 in lieu of the spur cut gears in the T90.
There are three major versions of the T90 to differentiate. T90A1The T90 used from 1946 to 1962 with the L and F-head four-cylinder engines is designated as the T90A1. These versions all feature top shifters, a 7" input shaft (stick-out length) with 15/16" x 10 splines and a felt-sealed front bearing retainer assembly. The input shaft has an 18 tooth, helically cut input gear. The cluster gear has a 33 tooth driven gear, resulting in a 2.79:1 first gear and a 1.55:1 second gear. Adapter 941185 k7 2 ?fc 4 Transfer Case Spicer 1 26 c18-15-10 3 g Dana model 18 Axels; Front brake backing plate to backing plate measurements 52.5 inches. Rear brake backing plate to backing plate measurements 59 inches Front axel offset to passenger side Rear axel offset to passenger side Front axel 18 center diff to passenger brake baking plate Rear axel 27 center diff to passenger brake baking plate Front axel 34 center diff to drivers brake baking plate Rear axel 32 center diff to drivers brake baking plate
