What would happen if you mixed up the trans cooling lines?

[SteveVB]

pressure around 60 -70 in all gears except R (70-80 or more ) at idle
partr throttle should rise up to about 120 and at WOT over 200.

these are general ranges from my 91 FSM- it gives ranges for two series of the trans- but for your purposes should be good to determine whether the pump is working.

Good Luck

 

[SteveVB]

One other item- did you disconnect the trans linkage when you pulled the engine? MAy wqant to check it make sure the linkage is hooked up correctly.

Just running throuhg some possibilities.

Good Luck

 

[grisc]

I didn't get a chance to check the pressure yet, but I took the lines off of the trans and figured since I mixed them up at first they might be clogged, so I blew them out from the input line and alot of rusty metallic fluid came out. So I hooked them up, (I used clear rubber lines) to see what was going on through them. As soon as it started up fluid ran right through the input line and then never came out the output line that goes back into the trans, and then the fluid stopped and started running back down the line like there was no pressure at all. So what if there is no pressure?

 

[SteveVB]

Originally posted by grisc
I. As soon as it started up fluid ran right through the input line and then never came out the output line that goes back into the trans, and then the fluid stopped and started running back down the line like there was no pressure at all. So what if there is no pressure?

Sounds like the cooler is blocked. What happens if you bypass the cooler- try that with the clear lines. See if the fluid circulates.

I think by hooking them up backwards you backflushed the cooler and may have contaminated the fluid and clogged the cooler and who knows what else. Just a theory.
I would pull the lines off the cooler and see what kind of flow you get at that point. You may be able to change the fluid and filter, do a flush to get things going again.

 

[grisc]

Steve, after you suggested to bypass the cooler, I thought thats gotta work then I tried it with the clear lines and the fluid ran through and back into the trans, but still NO gears are engaging, I must have to do the pressure check. So what does all of this mean, that there must not be enough pressure to engage the gears? Also, how can that be fixed?

 

[SteveVB]

If the fluid is flowing now, then I would shift it through each of the gears and recheck the level. Depending on how long the trans was unused fluid may not be everywhere in the system.

It may be worth while pulling the pan and changing the filter and fluid since it seems like that rusty fluid flowed back into the trans. The backflow of fluid may have deposited debris in the valve body, solendoids, and valves.

Did you check the linkage yet?

 

[Opera House]

Did you dissassemble the valve body?

The problem is likely there rather than the pump.

 

[grisc]

Yes, that sounds like the next step. I think it needs a fluid and filter change. The tranmission hasn't been run since July of this summer. Yes, I also have checked the linkage and as far as I know it is all correctly hooked up, I had someone look at it as I was shifting through the gears and it seems to be working correctly unless I am missing something. By doing a fluid change will it clean the debris off the valves and soleniods or can I do something for that? Also, how long should I be letting it run and shifting through the gears before the fluid reaches all of the system?

 

[Opera House]

I mean did you touch it before

There is very little information on the fluid flow but the cooler seems to get dumped fluid from other operations, not fluid out of the pump. I can't say what happens when X spool gets stuck. If the VB was ever turned upside down, it could have lost a keeper and now that spool is jammed. There are also the little hockey pucks that don't get noticed. My concern is not dirt, but that it isn't assembled properly.

 

[grisc]

Opera house- I didn't to anything to the valve body, unless I could have done something to it accidently. Could something like you were saying happen with out me dissassembling anything. I never touched anything with the trans, it is all original and all I had to do was move it around a little to mate it up with the engine, now if I could have done something to the valve body that way then maybe I did. I am not familiar the the valve body at all. Thanks for you help and let me know what you think.

 

[JDraper]

Two dumb questions for ya. First, did you make sure the torque converter was properly seated on the input shaft? Second, did you remember to bolt the torque converter to the flywheel? Not trying to be a smartass, but all of us have forgotten something at one point.

 

[grisc]

Oh I understand, I have done some dumb things, but as far as I no I seated the TC right, I lined up the the flat spots on the TC and placed it onto the spline of the trans, then mated the trans and engine up and bolted the TC to the flywheel. Is there a chance the TC could have become unseated? It probably can come unseated pretty easily huh? If the flat spots got bumped out of seating would the results be what I am going through now? Because after all of this discussion, I still can't figure it out. The only other thing I didn't really check is the whole issue about the valve body that opera house suggested, but I never touched that at all, and it was working fine before all of this. So what is the exact process I am suppose to follow to seat the TC and mate trans and engine up? Thanks for your help.

 

[grisc]

So even if the TC was unseated, the engine would still turn over and start right up fine? It starts fine right now and idles fine. I hate to have to unmate that trans again, but if you guys think that is it, I will get on it in the morning. Since I just did it, it is still pretty fresh in my mind and will probably be alot faster than before. If I do it this time, I just want to make sure it is done step by step correct. Thanks.

 

[JDraper]

If everything bolted together normally, it should be mated. Now that I went back and read a little, I saw in an earlier post that you had gotten fluid to start flowing when you fired up the truck. If the tc weren't hooked up, it wouldn't flow anything....

 

[grisc]

yes, I bypassed the cooler and used a clear rubber line, to check and see if the fluid was running through. As soon as I started it up, fluid ran through and back into the trans. Now, I don't know at what kind of pressure yet, but if for some reason the pressure was low, but enough to barely run fluid through the lines, would that possibly be why the gears are not engaging. I was going to do a complete trans fluid and filter change tomorrow and anything else that may eliminate some possiblities. What do you think?