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Old 01-27-2013, 02:51 PM   #16
LynnJr
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Join Date: Nov 2012
Location: santa rosa,california
Posts: 650
Re: 5-6 spd manual trans,4x4

Muncie SM 465

Top-loaded, tower-shift "granny-low" transmissions found in light and heavy duty applications. Cast iron case with cast iron top cover from 1968-87 and an aluminum top cover 1988-91. Non-synchronized 1st with brass synchro rings for 2nd-4th. All main shaft gears ride on bushings pressed on the shaft. The only gears that are removable from the countershaft are 3rd and 4th. Has GM casting numbers and two P.T.O. covers.

New Venture 3500/HM 290/5LM60
All aluminum case integral bell housing and a "Waffle" pattern on the outside.

New Venture 4500
1992-1996 cast iron case aluminum shift tower non-integral bell housing.

Externally the NV3500/HM290/5LM60 all fit the same but internally they are very different.You don't want a 6 cylinder transmission in a V8 so If your shopping Pick-N-Pull or E-Bay make sure you get a tranny off of a V8.Also some had low towers like the 1990-1992's and some had high towers like the 1993-1995 models so make sure you get the shifter with the transmission.The difference is only an inch but they don't swap.
Lynn
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