zmaster77

Hello,
Any suggestions on why 1st to 2nd gear the car jerks or shifts really hard, 2nd to 3rd is smooth.

BangScreech4-4-2

That may just be the way it shifts. Has a shift kit been installed? Can you give more details about the characteristics of the shift? Like: does it happen instantaneously and crisply or does it take a second and give you a feeling like it's in two gears at once followed by a mushy engagement of 2nd?

zmaster77

First off I have only had the car for 2 weeks, I bought it from out of state from a dealer, I don't know about a shift kit, the dealer gave me the receipts from when the transmission was rebuilt in 2018, the shift is abrupt and a jolt when it kicks in, the rebuild consisted of 3:42 gear set, u- joint kit, posi assy, new slip yoke, rebuilt rear diff, then in 2019 a 700 remanufactured transmission and converter installed, new drive shaft.
So I guess its not the TH350 transmission that I thought it was. I am new to this so I dont know alot about all the specs. the original 2 barrel carb was replaced with a holley 4 barrel, new intake manifold.

Fun71

Does this happen at light throttle, medium throttle, or full throttle? My car with a TH350 and shift kit will shift smoothly at light throttle but will bark the tires on a WOT 1-2 shift, which is completely expected with a shift kit. FYI, a quick (but not brutal) shift is more efficient and extends the life of the clutches than as smooth "I didn't notice the gear change" kind of shift.

70W-32

On the 700, the TV cable adjustment is critical to proper trans function and life. If you are not familiar with adjusting this trans, find a local mechanic who is, and have them set it up correctly before it burns itself up.

Fun71

Good point about the TV cable adjustment. I was in the mindset of a Th350 operation.