Hi. Any help is much appreciated. Driving at 120 km per hour in cruise control, approaching a hill the trans downshifts. The engine hits large revs and trans is not engaged. Pull off and realize there is a pin hole leak in trans line. Drive to nearest exit and fix line with rubber and hose clamp. Fill trans up and tranny is not shifting properly. 1st to 2nd - perfect. 2nd to 3rd it revs up until I let throttle off and it will shift to 3rd. No shift from 3rd to 4th. Manual shifting, there is no slipping in 1st ,2nd, or 3rd. Changed filter an probably most trans fluid due to leak and filter change. Thanks in advance for any advise.

 

You say from second to third it revs up until you let the throttle off but there is no slipping in 1st, 2nd, or 3rd. That sure sounds like slipping in third. The most likely cause is a failed or failing 3-4 clutch. It doesn't ever hurt to scan for trouble codes although I've never seen an electronic issue cause slipping in third.

 

Hi. Thanks for reply. When it gets to third , I dont believe it is slipping. With some decent throttle in 1st and 2nd manually shifting no slip . Go to put it in 3rd and wont shift till I put it in drive. When it gets in 3rd hard throttle- no slip. Wont go into 4th.
recap. 1st to 2nd fine. In 2nd it reaches shift point an free revs until I let off the throttle( in 2nd )and it will hit third. Never 4th. I checked 2/4 servo and there is 1/4" inch of depression and feels pretty loose.