Starting new thread in hopes of avoiding "thread fatigue"
My transmission woes on my 2000 V70XC have been documented on thread "Why won't trans shops touch my 200 V70XC" Briefly, I bought a clean car with a bad transmission and had a used, low mile, transmission installed by a competent shop. After about 4500 miles and 4 1/2 months all was greatl until last week when the dreaded flashing arrow returned, the car went into "limp mode" and codes PO1618-Volvo-"fault in lead between AW50-52 and Motronic 4.3 (MIL requested, code PO1633-VOLVO-"vehicle speed sensor signal, and code PO722-generic-"out put shaft speed sensor circuit no signal came up. Car was returned to trans shop and problem could not be found. Connectors were unplugged and re-connected, no problem as found. another week and a tousand miles or so, and the flashing arrow, the "ABS", "TRAC", and check engine light returned, as did the "limp mode" and the same codes. Mysteriously, all disappeared and returned to normal. After a few run cycles, all returned and disappeared again, except for the "limp mode", which is sporadic. Car back at shop, and again, no problem is found as all have disappeared again.
The weather has been heavy rains and snow. I'm suspecting that the problem may be caused by a bad harness or connector, possibly damaged or pinched during trans swap, or bad on replacement trans.
Has anyone had problems similar?
If trans shop can't find problem, I'm dreading trip to snotty, way overpriced shop in very wealthy suburb who disdains selling parts or working on "old cars", (mine is a 2000 XC) Only independent Volvo shop is about 40 miles away in Ann Arbor, but has decent reputation.
Can anyone offer any tips?
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