transmission Question

[bigdaddyinks]

My 1983 Monte was ordered by the original owner with posi. Does any one know possibly what transmission I may have and rearend? I wasn't sure if there was a stock posi rear and transmission combo for that year from the factory or not. I figured with the knowledge base from this site someone would know. I do know it's either a th350 or th250 but don't know how to tell the difference, pans are the same. help me please.

 

[383Camino]

I have the super-awesome :shock: 250-C in my '83 Malibu wagon, and also got one in my '84 El Camino.

If you slide under the car on the passenger side, look up up above the modulator and you should see what looks like a threaded stud stocking out the the transmission. This is the adjustment for the second gear band. If you have this, you have a 250.

A 350 may have a cast-in boss for the stud, but will not be drilled out. I would bet that you have a 250.


The rearend will be the 7.5" 10-bolt.

 

[bigdaddyinks]

Thanks 383 I'll check tomorrow

 

[Minion1186]

most likely a th350 transmission and a 7.625" 10 bolt,the monte rears happen to be 28 spline,instead of the other 10 bolts in g's that are 26.

 

[Blake442]

The 7.625" 28 spline rear's were only in the later ('85-'88) Monte SS's... His Monte will have the standard 7.5" rear.