AT slow to respond

[Jeepnut]

Greetings....

When cold (not "cold" but sitting overnight) my '86 takes a while to shift into reverse. First nothing, then it slips a little, then it fully engages. When warm, it's not a problem, shifts forward and reverse are fine.

It has 150k miles.

Any ideas?

------------------
Jeepnut
Mesa 4-Wheelers
Mesa, AZ (Rockcrawling Utopia)
'86 SJ stock, but not for long
'87 SJ, mostly stock, mostly wrecked, parts truck.
'90 YJ SOA D44x2 (SJ axles!) Detroitx2 4:56 4:1

[wn]

<BLOCKQUOTE>quote:</font><HR>Originally posted by Jeepnut:
Greetings....

When cold (not "cold" but sitting overnight) my '86 takes a while to shift into reverse. First nothing, then it slips a little, then it fully engages. When warm, it's not a problem, shifts forward and reverse are fine.

It has 150k miles.

Any ideas?

<HR></BLOCKQUOTE>

Had the same problem recently with my J-10. It was low on AT fluid. The reason it was "low" was the tube running to the radiator was laying on the front differential and had worn a small hole in it. It was an easy fix and cheap. My first guess would be to check the fluid.

[Jeepnut]

Thanks for the response. Fluid level is okay when checked (hot). It's been a while since the tranny has been serviced though...

Walt

[ibnfe]

Might be a partially clogged filter. This condition happens with low fluid alot, clogged filter may cause the same, or dirty fluid.

------------------
If my Jeep can't get me where I want to go the way it sits, then I need to modify it some more (So far it has). After all, Jeeps owners can do anything!
'85 Grand Wag
healthy new 401 inwork!
MSD ignition
Beefed 727
new gears n goodies
35x12.50 BFG KO's
Custom Flares
Custom Suspension and 38" mudders soon!
Be gentle, I'm gettin' there!

[jeepbob]

While you are changing the fluid, adjust the bands. As the bands wear the servos must travel farther to engage them and sometimes hang up a little, causing slow engagement.

------------------
65 wag. 360/edelbrock rb4/t400/20 t-case/4:10 d27/d44 broken power lok/onboard air/onboard 110v power(no inverter)/1999 Lincoln t.c.leather buckets/Lincoln ctr console/winch/33x12.50/tunes/water proof door pads
soon to have new motor/d44frt/d60r(4:10)welded diff/custom bumpers
see ya in da mud

[tuckers89GW]

Also, If I'm not mistaken(please correct me if I am) the 727's torque converter can drain and until you take the tranny out of park the pump doesn't pump. I have the same problem with mine. Both this and my old jeep did this. My drive also is slow now and then.

------------------
Mike
<UL TYPE=SQUARE>
<LI>'89 GW
360
completely stock
<LI>'85 VW Quantum (my racer)
2.2L 5 cylinder
<LI>'99 Windstar
3.8L V-6
<LI>see MY JEEP (http://tuckermj.tripod.com/jeep/)[/list]

[jeepbob]

as long as the engine is running the pump is pumping. The only diff between p and n is p has a lock to keep the tranny output shaft from moving.

------------------
65 wag. 360/edelbrock rb4/t400/20 t-case/4:10 d27/d44 broken power lok/onboard air/onboard 110v power(no inverter)/1999 Lincoln t.c.leather buckets/Lincoln ctr console/winch/33x12.50/tunes/water proof door pads
soon to have new motor/d44frt/d60r(4:10)welded diff/custom bumpers
see ya in da mud

[UnkleMunky]

<BLOCKQUOTE>quote:</font><HR>Originally posted by jeepbob:
as long as the engine is running the pump is pumping. The only diff between p and n is p has a lock to keep the tranny output shaft from moving.

<HR></BLOCKQUOTE>

This is true of GM auto trannies as far as I know, but are you sure about the Mopars, Bob? I'm pretty sure I've heard that in "P" the fluid is not pumping in the 727s. I KNOW this is true of some other Mopars(particularly the A413 in my pluggermobile). I did a FULL flush of the fluid and it was clearly not pumping in "P".....but did in "N". BTW...I agree on the filter/fluid/bands suggestion further up.....definitely worth doing on ANY tranny that hasn't had that done recently!



------------------
Michael(UnkleMunky)
'78 J10: 258, 4 speed, longbed, topper
'76 J10: Honcho, 360, TH400/QT
'89 Plymouth Reliant(PluggerMobile)
J-Pages(some of my auto pages) (http://www.eskie.net/superior/j-pages/index.htm)
unklemunky@eskie.net

[ARJeepman]

Mine has this problem too.........so does my Dodge truck w 360/727. It's torque converter leakdown.Finally replaced the one in my truck.Good luck with yours!