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Old 01-23-2009, 10:21 AM   #1 (permalink)
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Default 93 tracker automatic transmission 4x4

I have a 93 geo tracker lsi 4x4 with the 3sp automatic transmission.
Im have a problem with it.
when its cold it will not shift out of 1st gear it just gose into neutral , so when the rpms hit 3500 where it would shift it just gose into neutral.

But heres the thing if you let it run a few minuts and let the temp gauge start to come up it shifts no problem at all with shifting..

I changed the trans filter 3 weeks ago I was thinking it may be a clogged filter.
anyone know why cold no shift warm shifts every time????

no other problems trans.. or 4x4
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Old 01-23-2009, 01:25 PM   #2 (permalink)
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did you do the maintenance on it, scheduled?

full flush time, new tranny filter, drop pan, etc.
you might save it.

a clogged filter starves the pump.
this will destroy the bands, in no time. if bands start slipping.

but it can by 50 other things too, it is after all a complex unit.
thin oil slides past dirty filter?

Slush pump diagnosis

if that dont fix it , there are other parts that can be tried.
and tests.
the are many on car tests for this tranny 3L30 (th180)

Stall tests, pump pressure test, new mod valve, new governer.
to name 4.

cheers.
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Old 01-23-2009, 02:20 PM   #3 (permalink)
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Quote:
Originally Posted by jtgh View Post
did you do the maintenance on it, scheduled?

full flush time, new tranny filter, drop pan, etc.
you might save it.

a clogged filter starves the pump.
this will destroy the bands, in no time. if bands start slipping.

but it can by 50 other things too, it is after all a complex unit.
thin oil slides past dirty filter?

Slush pump diagnosis

if that dont fix it , there are other parts that can be tried.
and tests.
the are many on car tests for this tranny 3L30 (th180)

Stall tests, pump pressure test, new mod valve, new governer.
to name 4.

cheers.
Hi yes I went the whole 9 yard on the trany. new filter new fluid had the pan off all that good stuff and yes I did the work my self..

Do you have a link to the info on how to do the test??
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Old 01-23-2009, 03:46 PM   #4 (permalink)
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how to test
autotrannys-both3n4sp.zip | FreeDrive.com | Online Storage and Social Utility

how do do it
My FreeDrive | FreeDrive.com | Online Storage and Social Utility
fsm chapter 7a , on car tranny fixes

tons of information
sorry i didnt know you were at step 2.
almost no one posting here, ever does fluid changes on the AT.
they drive it unit it dont go and then wonder.......

my wife has an AUTO, and i service it , buy draining it every 3rd oil change.
it has a drain plug, some 180s do others dont, so many just add a plug
and drain out 3 qts every 3rd engine oil change, this keeps the filter fresher too.

I hope your problem is a bad gov or modulator.
it might be the gov.
analysis.
it increase pressure to the valve body part that shifts car as you increase MPH.
if yours is bad it can hit, enough pressure to hit 3.
but that dont explain , FLARE.
i bet there is a 180 page somewhere with more indepth troubleshooting.

I will try to find that late tonight.

cheers.
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Old 01-23-2009, 04:24 PM   #5 (permalink)
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Quote:
Originally Posted by jtgh View Post
how to test
autotrannys-both3n4sp.zip | FreeDrive.com | Online Storage and Social Utility

how do do it
My FreeDrive | FreeDrive.com | Online Storage and Social Utility
fsm chapter 7a , on car tranny fixes

tons of information
sorry i didnt know you were at step 2.
almost no one posting here, ever does fluid changes on the AT.
they drive it unit it dont go and then wonder.......

my wife has an AUTO, and i service it , buy draining it every 3rd oil change.
it has a drain plug, some 180s do others dont, so many just add a plug
and drain out 3 qts every 3rd engine oil change, this keeps the filter fresher too.

I hope your problem is a bad gov or modulator.
it might be the gov.
analysis.
it increase pressure to the valve body part that shifts car as you increase MPH.
if yours is bad it can hit, enough pressure to hit 3.
but that dont explain , FLARE.
i bet there is a 180 page somewhere with more indepth troubleshooting.

I will try to find that late tonight.

cheers.
Hi
yeah I change the trans fluid in all my AT and the filter ... I burned a trans up in a jeep i had over a filter cost $800. to fix over a $12 filter..
Now I change that stuff out first week on any car I buy because no one ever spends money to get it done...
I hope this is an easy fix
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Old 02-21-2009, 11:31 AM   #6 (permalink)
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Hey guys Im new here, but I found this post while searching my problem on the net.
Mines an 89 auto. I've done tranny flushes and filters and it gradually got worse over time.
You have to keep the tranny in second until it warms up than it'll shift up through all gears. Shifts fine when its warmed up tho.
Only happens in cold weather... fall, winter, spring. In summer its fine. First thing I changed was the vacume modulator because I could hear a vac leak but it didn't correct it. I didn't pull the mod valve out tho. It seems to be something hanging up untill the fluid and metal reach op temp. I'm gonna try to get some tranny treatment to loosen everything up and see if it helps.
I've only heard of this a few times and one fellow said he changed the mod valve, solenoid and a buch of parts... without repair until he swapped out his ECM.
I've got some spare parts I'm gonna try swapping out... let you know what happens!
JC aka Kazuki
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Old 02-22-2009, 08:24 AM   #7 (permalink)
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Quote:
Originally Posted by gregx View Post
I have a 93 geo tracker lsi 4x4 with the 3sp automatic transmission.
Im have a problem with it.
when its cold it will not shift out of 1st gear it just gose into neutral , so when the rpms hit 3500 where it would shift it just gose into neutral.

But heres the thing if you let it run a few minuts and let the temp gauge start to come up it shifts no problem at all with shifting..

I changed the trans filter 3 weeks ago I was thinking it may be a clogged filter.
anyone know why cold no shift warm shifts every time????

no other problems trans.. or 4x4
Myself more partial to rebuilding powershifts but; always complete visual stopped.... Did you check cooler lines and flush;verify no restrictions in cooler lines, kinks or such. Any indications of leakage when you remove vaccum line at modulator?


1) First verify condition exsists in both 2 and 4 wheel. If you can remove governor; check for heavy sludge accumulation and or binding piston servo in governor. You should be able to depress servo with moderate pressure and it should smoothly return without binding! If so closely inspect quille and servo piston.

2) Block all 4 wheels in the air; test "unloaded" wheels and monitor through gradual increased acceleration observing upshift 1,2,3 watching RPM gauge for drop each upshift point.... does upshift occur similar RPM

3) Next test apply light resistance application at both wheels on same axle
(2 wheel mode) does it upshift normally????

4) Next perfom roadtest and monitor RPM'S closely when upshift occurs; accelerator held at constant speed..... what is happening to RPM'S??? Personally I doubt it's going into neutral..... DO you hear any noises or clashing when this condition occurs???? Shifter doesn't actually move.....

5) Testing with pressure gauge may not always be possible but always perform "forced downshift" through 3-2, 2-1 (accelerator closed/"off") monitor for forced deacceleration and RPM increase "surge" when downshift occurs!

6)Test as if it was actually a manual; shifting manually and monitor smooth "similar" RPM'S at each upshift point. What happens on downshift; do you feel engine braking....


You must be specific what is happening to engine RPM if you hold accelerator constant when you say it goes into neutral; does RPM spike or hold????If you suddenly close throttle at 3500 as you say..... does engine brake or coast???

A master has great eyes, ears , and feel before the tools even come out!!

I strongly suspect governor is likely binding most commonly sludge buildup or servor piston wear/damaged seals. Cheapest check before you start shelling out da cash! Next replace modulator; just by service level alone, proper full service and adjustment I replace modulator anyway! If you have a vaccum hand pump test it with vehicle unloaded.... is it holding vaccum and does it have adequate vaccum signal! Even observing operation unloaded wheels will provide answers!!!!

Pump is highly unlikely since the pump pressure would decrease with temp!
If the above haven't resolved your problems hookup pressure test gauge and record "all" pressures; cold, hot,manual and auto upshift and forced downshift tests. I am confused though; thought you mentioned you suspected modulator but never changed it????

Continuing as is; likely trans will be headed elsewhere soon anway but 90%probablity governor servo is binding. You can also trigger upshift wheels unloaded using vaccum handpump as well and test at lower RPM'S to confirm modulator operation.
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Old 02-25-2009, 06:22 PM   #8 (permalink)
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So I did a little research and threw in a product called LubeGard.

International Lubricants, Inc. > Transmission Products

I've gone only approx 50km and the tranny is already shifting better when cold.
It seems to me that the "sticky gov" theory is the best explanation.
Going to try and do a good run woth it tomorrow and see if it improves.
Keep you post on how it goes.
Kazuki
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Old 03-03-2009, 12:43 PM   #9 (permalink)
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Well I didn't get more than 100 or so km on it and someone bought it off me!
The lubegard seemed to be doing its job tho. So in my case I think a good tranny flush product,than new fluid with lubegard and it would have been fine.
I will see the guy who bought it off me so I can let you know what he did.
Kazuki
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Old 03-03-2009, 09:24 PM   #10 (permalink)
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A master has great eyes, ears , and feel before the tools even come out!!

best post ever !!!

and all content,

only one comment, keep loose clothing and body away from spinning wheels.
no guards.

you can tell harley does a lot of tranny work.
loaded and unloaded test. now that is tricky.
love it.
thanks.
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