Just needed to make sure I wasn't crazy!!!For some reason my turbo 350 is not shifting into 3rd..it winding out about 60mph.Any ideas anyone??its got a 3.31 rearend.thanks bm
Poncho's right. You need to check and make sure you have vacuum to the transmission modulator valve. You should have shift points first to second around 14 to 18 mph, second to third about 26 to 32 mph.
mAYBE its your tranny filter, my th350 would down shift on its own into 2ed and stay there, i had to drop it in to L2 than back in to D "drive" so it would shift, sometimes it wouldnt shift out of 2nd eather. try a new filter and see if it works.
Unless someone has had the filter off and got the gasket on wrong, where it is restricting the flow, or the trans is toast, thus plugging the filter, changing it will probably do no good.
As I have posted here numerous times in the past, changing the fluid and filter is "preventive maintenance", not repair. Very seldom will changing the fluid and filter correct a problem with an improperly operating transmission, as long as the fluid level is right.
I would be looking at vacuum lines to see if one has been knocked off at the engine or at the trans.
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