93 j30........ no reverse............please help

[luis180sx]

i just put in a used engine and transmission and the car starts right up i can put it in drive but when in reverse it revs up like neutral, ive ran into a few electrical bugs in the car (the signal for the fuel pump relay doesnt send power to the pump, the relay is new, so i bypassed the relay just to see if the car starts and it did, but no reverse. can this be something electric? or a bad transmission?

thanx

[luis180sx]

the car has been sitting for 3 years

[maxnix]

With no maintenance history, who can tell?

What is the color of the fluid? Does it drive normally otherwise? All connections verified?

[eergsxr]

i got the transmission from the junk yard, the car only had 89k miles, it is a 95 that im putting on my 93, it all bolted right up and plugged right up, the fluid was drained when i got it

[Q45tech]

89k can be good and useful life on a J30 [R01R03A] transmission due to the gumming up of the in radiater heat exchanger [common] and fluid starvation. Problem often show up as no reverse.........find another transmission.

We had a customer buy a junk yard transmission and pay us for install........he went back 3 times for replacements [and paid us install and removal 4 times] until he finally got a functioning unit. Then 2 months later he came back and we installed a new reman from Nissan for $2,800.

Rehabing a car that has sat for 3 years is always interesting.