L3N71B 3-Spd Auto Tranny No Lockup?

General information about the first-generation Nissan Maxima in the US. What was the Datsun 810 became the luxury leader Maxima in the US in 1981.

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L3N71B 3-Spd Auto Tranny No Lockup?


Post by Carimbo » 14 years ago

Others have said the lockup at 37MPH is noticeable. On mine it is definitely not noticeable. FSM states the shock is low and hard to determine and suggests using a tach to verify a 200-400 RPM decrease.

Can you guys really feel it when the lockup kicks in?

My car has no tach but have wondered about fitting a temporary one (engine test meter) off the diesel's RPM counter. Would this work?

Would really like to know if the lockup is working.

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Post by asavage » 14 years ago

It feels like another shift. It is not subtle. Mine is definitely on the 400 RPM end of that range. I have a stretch of commute that is 35 MPH, hilly, and it's a real PITA when I try to use the CC on that two miles of road, as it's locking and unlocking all the time.

Perhaps you don't have a L3N71B. What does the firewall plate say? Or maybe someone put a 3N71B in (gasser or diesel). I don't think it will have this on the side of it, if it's correct:

(archive photo from CL)

Come on out this way sometime, you can drive my '82 Wagon!
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

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