What to do if Turbo 350 wont shift into 3rd gear?

It is a solid version (available at transmission parts shops) of this clip and is the hot ticket to making TH350’s keep from messing up the cases with clutch wear. At minimum install a shift kit (Tran-go) as they will actually increase the life of the unit as it minimizes the shift timing between gears thus reducing wear.

When does transmission shift hard from 1st to 2nd Rd?

When car transmission Fluid is low or dirty is could lead to transmission shifting hard from 1st to 2 nd and even from 2nd to 3 rd. So when you have a gear shifting issues, one of the things to check is your transmission fluid.

Why is my car not shifting into 3rd gear?

Manualy shift into 2nd, and bring the car up to 40 MPH, then put the shifter into 3rd. There should be a very noticable drop in RPM when it shifts! If you get a “flare-up” in rpm, or delayed engagement, you very likely have an internal trans problem.

How is the Trans shift on a TH350 controlled?

Hi William, Auto shifts are controled by governor pressure, the governor is a centrifugal device that opens a spool valve, based on speed. The modulator & throttle valve are used to supplement the governor by “sensing” engine load and throttle angle. This is what makes the trans shift later, or down shift when you floor it.

How can I tell if my TH350 is shifting into 3rd gear?

I have used B&M shift kits in two TH350’s that I’ve had, and the 2-3 shift feel, remained pretty much stock. You can tell if It’s shifting by watching the tach. Manualy shift into 2nd, and bring the car up to 40 MPH, then put the shifter into 3rd. There should be a very noticable drop in RPM when it shifts!

What causes a transmission problem on a GM Turbo 350?

If you look at the list below, it quickly becomes evident that many problems can share a common cause, such as the transmission being low on fluid, or the gear shift selector not moving the manual valve correctly. The TH350 has one advantage over a TH400 in that the filter is attached to…

Where can I get a GM Turbo 350?

This Tech Tip is From the Full Book, GM TURBO 350 TRANSMISSIONS: HOW TO REBUILD AND MODIFY. For a comprehensive guide on this entire subject you can visit this link: SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in.

What makes a trans shift a down shift?

This is what makes the trans shift later, or down shift when you floor it. If you are getting normal 1-2 shifts, but no 2-3 shift, you may have a sticking governor, or a misadjusted manual valve, (the shifter cable).

Why does my car not shift into third gear?

Such a problem is automatic transmission won’t shift into 3rd gear. The transmission shifts into the first and then to second gear but does not move into the third gear. It seems that the gear slips into neutral when you push it to the third. Another instance could be the automatic transmission won’t shift into 3rd gear at all.

How to fix when automatic transmission won’t shift into?

The PCM will have no input if the speed sensor fails. In that case, the transmission will not shift properly. To solve this problem, you have to check the speedometer to see that it is functioning. Otherwise, replacing the VSS could be the solution. Tsukasa Azuma is an awesome car blogger of Car From Japan.