well my blazer now has only 2 gears, the trans was fine before, the rear was just replaced due to blowout, only thing different from the rear axle is drum brakes, before it was 4 wheel disk, any clue why?

 

heard it could be a transmision control module could this be it?

 

Could be a problem with the 2-3 shift solenoid.. Are there any codes present?

 

i do not know if the codes are present at the moment

 

new got it into 3rd and 4th but u have to manually shift it, it doesnt do anything when standing still in drive, you have to start off in 1st or 2nd than go into 3rd at 35ish then 4th at 55

 

From the 4L60E Information & Common Problems - Compilation:

- No forward movement in OD or D, but L2, L1 and R work: Forward sprag is broken. R&R. Try not to run or drive the car or further damage could result.

And this is likely what is going on:

- Transmission does not shift automatically, only manually. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS.

 

oops we put lik 40-50 miles on it yesterday

 

Is it difficult to replace the forward sprag? Does it involve opening the tranny? Any info would be appreciated greatly!
/Kim

 

Yes you must open the tranny to replace the forward sprag. While its open you should have it rebuilt.

IT may be cheaper to replace the tranny with a salvage yard unit that has a warrenty. If you do go the salvage yard route, put in one can of tranny shock instead of 1 qt of tranny fluid.

 

well about 2 months ago i lost 4th and first and yesterday the trans is no more