46RH tranny- fix or replace? - Page 2 - JeepForum.com

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post #16 of 20 Old 02-09-2013, 07:57 PM Thread Starter
GTB
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1995 ZJ 
 
Join Date: Nov 2012
Location: Black Canyon City
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Kinda a maybe important thing

I just realized something that might have bearing (no pun here).

I used a long length of aquarium air tubing to siphon out about a gallon of ATF. I had worked on getting the engine running right from there. IT WAS NOT driven during this time. I replaced the MAP and plugs, a few other bits of engine work (IAC cleaning, etc). Runs beautifully. While running to temps I tried D1 for kicks. It worked. It worked in 4lo in D1 as well. Still no reverse.
For the first time in a year it moved on it's own in D1. I put her in 4lo/D1 and turned around in a loop to put her on ramps. No problems. I then pulled the trans pan.

After I dropped the pan there was maybe 1qt. ATF left, with the strut in the pan. That's where we are now.

Probably should have mention that earlier. Beers...oops.

It shifted in and out of D1 and apparently with no strut? Got me. The low fluid? I'll see what I can find when the weather clears...THX

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post #17 of 20 Old 02-09-2013, 08:01 PM Thread Starter
GTB
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Cool, Foundrydude. Will try it in a few days when the weather clears and warms/dries.
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post #18 of 20 Old 02-10-2013, 12:14 AM
jnicewan
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D1 and regular 1st gear are going to be the same thing as far as having 1st gear. What the rear (low/rev band) does in D1 is the band engages for engine braking, the low/rev band is not engaged in 1st gear in "D" position. Engine braking is for when you let off the accel the trans holds 1st gear and the engine will slow the the vehicle down. Normal 1st gear in "D" during decel the trans over-runs (freewheels) so you basically do not feel any engine braking. its like a neutral effect. Engine braking is the same effect you would have with a manual trans by slowing down while leaving the vehicle in gear and no clutch. No engine braking is the same effect as putting the trans in neutral or pressing the clutch down when slowing down.

So the rear band (low/rev) does not play any roll in the engagement of 1st gear, it only applies for the engine braking effect. If you revved out 1st gear in manual low/1st position and let off the accel and the engine went to idle or felt like neutral then then there is a band apply problem, if the engine slows the vehicle down then the band is applied or engaged.
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post #19 of 20 Old 02-10-2013, 03:17 AM Thread Starter
GTB
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Join Date: Nov 2012
Location: Black Canyon City
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You lost me, jnicewan.
Are you trying to tell me that when I manually shift to D1 the reverse/lo band is not involved? I thought that shifting to 1 (D1) was a manual engage of the rear band, just as shifting to R is. Did I miss something? Thx.
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post #20 of 20 Old 02-10-2013, 10:36 AM
Foundrydude
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Join Date: Jan 2011
Location: Flatsville
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I can't believe you put that trans into gear, again, knowing what you know.

The fact first grabbed instead of slipped after fluid was dropped is not a good thing.

good luck with it
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