91 Sentra Tranny Problem

Post by **kjarboe** » Fri Jan 30, 2004 5:57 am

I've got a bone-stock 91 Sentra 1.6 Auto-Trans.Seems like it's jumping between gears during normal cruising speeds. Do these transmissions have lock-up convertors or other electronics that I can troubleshoot? HELP.... Thanks!

Post by **Onizuka** » Fri Jan 30, 2004 5:57 am

Might be time for a full tranny flush if you have never had one before. Best thing to do is take it to a mechanic you trust and get the scoop on what could be going wrong.

Post by **NISTECH** » Fri Jan 30, 2004 5:57 am

check your fluid level and condition. If it is above the lower hot line drop it till it is about half way between the 2 cold marks. if the fluid condition is dark or smells burnt[similar to gear oil smell] have a complete flush done by a shop that uses a complete exchange machine.

Post by **kjarboe** » Fri Jan 30, 2004 5:57 am

Thanks for the responses everyone. Fluid is good, I change it every 30,000. Seems like the lockup convertor is getting signaled to in/out/in/out of lockup at cruising speeds. I'm wondering which electronic sensors control this. (TPS maybe???)Appreciate any advice or pointers. THANKS:help

Post by **NISTECH** » Fri Jan 30, 2004 5:57 am

hook up a volt meter to it and check it. should be around.5volts at idle and sweep as you rotate the throttle drum to WOT. and exceed 4.0 volts. this is done with the car warmed up and not running.

Post by **drjohn** » Fri Jan 30, 2004 5:57 am

This maybe a performance issue. At cruise with lite or parcel throttle you could be getting egr pulse do to glogged egr port's, or a clogged egr vac. port.

91 Sentra Tranny Problem

91 Sentra Tranny Problem

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