Manual Transmission and T-Case Fluid Change Today

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DanW

DanW

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Two things....First is the obvious. You know we can't sit here and restrain ourselves from asking what the heck happened, right? :CWL: There just MUST be an epic story involved here that would make SportsCenter for Jeeps, if there was such a thing!

Secondly, it is amazing what these complex pieces of machinery are capable of surviving. Wow!

My brother had a 91 YJ 2.5/5 speed. My nephew was 16 and snuck it out to do a little off-roading on some sand flats by White River in Indianapolis. He was driving along in the water when his left wheels went over a drop off. The Jeep landed under water on the driver side. My nephew crawled out the passenger side and got up on the sand flat and sat on a log for two hours before finally calling his Dad. When my brother got there, I can only imagine his reaction. When he realized it had been sitting under water for well over two hours at that point, he asked his son why he waited so long to call him. His response? "I was trying to think of what I was going to tell you." LOL, my brother blew a gasket at that point and said, "WHAT?!?" "What story did you imagine you were going to come up with that would explain this?!?" :LOL::CWL:

So, that Jeep was pulled out by a wrecker and taken to a local shop in our town west of Indianapolis. They removed the gas tank and cleaned mud out of it, cleaned it out, removed valve covers, etc, cleaned what they could, and changed every fluid, including the coolant, power steering, brake, axles, t-case, oil, tranny,etc, and even the window washer. They ran it for a few minutes around the parking lot, then drained and refilled again (everything but the window washer fluid at this point) They drove it a bit more this time and did it again. At that point, they told my brother to change the oil again at 200 miles and inspect it, as well as the transmission and axle fluid. They all looked good at that point, but he changed it again. That little Jeep was later sold to another family member who ran it until it rusted out. It had well over 300k miles on it with no rebuilds, but only a couple clutch replacements. The engine ran great and the tranny had no issues, even when the rest of the Jeep was pretty much toast. Amazing!

So based on that, the only thing I'd recommend is inspecting and changing the tranny and affected components' fluids one more time after a couple hundred miles, just for good measure. It might not be necessary, but it sure couldn't hurt.





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Ppita02

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Long story short, I flooded the jeep the day I bought it and never even made it home. It was used but still not a proud moment.

I was crossing a River after watching a Jeep go through maybe 25ft to my driver side...so I figured it was safe to cross.
As I proceeded to cross in the water...I was maybe 1/3 if the way through and out of no where was a 6ft shelf in the sand bar and my Jeep took a nose dive. Water was past my hood and halfway up on the driver side window at an angle straight down maybe a 45 degree angle. As soon as I realized I couldn’t reverse I shut off the engine. GMRS back to my buddy behind me and said I’m stuck and can’t move. Water started coming up inside towards my feet inside the cab. Maybe 30mins had past before the motor was out of water. I was able to open my doors and let water out of the cab. And pulled the drain plugs to remove remaining water simultaneously. all electrical went to a fritz, oil/gasoline leaked into the water and that’s was it. Disconnected all batteries and killed the jeep completely. (Yes both main and aux).
Towed back to Dallas, wife didn’t talk to me for like two weeks, and I sent from shop to shop, then worked on my own and last dealership got it started. This was a span of three months, and was able to get the Jeep back before thanksgiving and drove it from Dallas to Denver just fine. (At this point the only thing replaced was the spark plugs, diff flushed, motor flushed, tranny cycled with with fluid and that was all. The original PCM was replaced after new one didn’t work. It’s really a mystery how the Jeep is running right now. Even the guys at the dealership (whom is the best dealership I’ve dealt with. They actually were intrigued to get the Jeep running) where as two other dealers didn’t give two shits so they ran me a bill for random parts.
Overall, like I said it’s a mystery...that I am willing to put behind me.

This Jeep has been on road to various parks, overland trips, out of state and collectively close to 10k miles in the last 6-8 weeks since I got her back. It’s been a blast and so far so good. Runs even better after the thorough fluid flush. And feel the more miles I get on the odometer the more it’s getting broken-in again and running smoother each time.

Cheers,


P.S. I now have anxiety when I come to large water crossings. Not fun.
 

Rubi

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Two things....First is the obvious. You know we can't sit here and restrain ourselves from asking what the heck happened, right? :CWL: There just MUST be an epic story involved here that would make SportsCenter for Jeeps, if there was such a thing!

Secondly, it is amazing what these complex pieces of machinery are capable of surviving. Wow!

My brother had a 91 YJ 2.5/5 speed. My nephew was 16 and snuck it out to do a little off-roading on some sand flats by White River in Indianapolis. He was driving along in the water when his left wheels went over a drop off. The Jeep landed under water on the driver side. My nephew crawled out the passenger side and got up on the sand flat and sat on a log for two hours before finally calling his Dad. When my brother got there, I can only imagine his reaction. When he realized it had been sitting under water for well over two hours at that point, he asked his son why he waited so long to call him. His response? "I was trying to think of what I was going to tell you." LOL, my brother blew a gasket at that point and said, "WHAT?!?" "What story did you imagine you were going to come up with that would explain this?!?" :LOL::CWL:

So, that Jeep was pulled out by a wrecker and taken to a local shop in our town west of Indianapolis. They removed the gas tank and cleaned mud out of it, cleaned it out, removed valve covers, etc, cleaned what they could, and changed every fluid, including the coolant, power steering, brake, axles, t-case, oil, tranny,etc, and even the window washer. They ran it for a few minutes around the parking lot, then drained and refilled again (everything but the window washer fluid at this point) They drove it a bit more this time and did it again. At that point, they told my brother to change the oil again at 200 miles and inspect it, as well as the transmission and axle fluid. They all looked good at that point, but he changed it again. That little Jeep was later sold to another family member who ran it until it rusted out. It had well over 300k miles on it with no rebuilds, but only a couple clutch replacements. The engine ran great and the tranny had no issues, even when the rest of the Jeep was pretty much toast. Amazing!

So based on that, the only thing I'd recommend is inspecting and changing the tranny and affected components' fluids one more time after a couple hundred miles, just for good measure. It might not be necessary, but it sure couldn't hurt.
Good to know how rugged our Jeep’s really are.
 

Jeep Generation

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Did my 30k interval fluid change on the 6-Speed Transmission and Transfer Case yesterday. Took about 4 1/2 quarts of ATF+4 to do both.
 
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Did my 30k interval fluid change on the 6-Speed Transmission and Transfer Case yesterday. Took about 4 1/2 quarts of ATF+4 to do both.
Nice! That's under 30 bucks to do both, with an ATF+4 like Valvoline, or even under $25 if using one like Supertech. I'd bet a dealer would charge an arm and a leg for that. Probably a couple hundred bucks, anyway!
 

Jeep Generation

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Nice! That's under 30 bucks to do both, with an ATF+4 like Valvoline, or even under $25 if using one like Supertech. I'd bet a dealer would charge an arm and a leg for that. Probably a couple hundred bucks, anyway!
I picked up Castrol Transmax ATF+4 from Autozone down the street from my house. They had it on sale, so extra bonus. Definitely way cheaper to do it yourself. I filmed the process, I'll try and wrap up the video and post it here.
 

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HeavyUser

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Changed out my Trans Fluid a few months ago, having issues with getting locked out of 1st and Reverse on a cold start..... If I shift into 3rd or 4th I can then put it into 1st or Revers, going to trying swapping out the Trans Fluid AGAIN with Redline C+ ATF.
 

cnapierala

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Changed out my Trans Fluid a few months ago, having issues with getting locked out of 1st and Reverse on a cold start..... If I shift into 3rd or 4th I can then put it into 1st or Revers, going to trying swapping out the Trans Fluid AGAIN with Redline C+ ATF.
Curious to hear how it goes. I have been thinking about trying some different fluid in mine as it is a bit quirky when cold especially.
 

Jeep Generation

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Changed out my Trans Fluid a few months ago, having issues with getting locked out of 1st and Reverse on a cold start..... If I shift into 3rd or 4th I can then put it into 1st or Revers, going to trying swapping out the Trans Fluid AGAIN with Redline C+ ATF.
Curious to hear how it goes. I have been thinking about trying some different fluid in mine as it is a bit quirky when cold especially.
Yeah I am curious also. I haven't had an issues like that with mine. What oil did you use last time?
 

Bigfx1

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Would it hurt changing the fluid after 2 thousand miles to get out anything from the initial transmission break-in or am I being overly cautious
 

HeavyUser

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Yeah I am curious also. I haven't had an issues like that with mine. What oil did you use last time?
I think Valvoline, can't honestly remember.

There are a few other members that are also experiencing the lockout on cold starts, 1 stated that it went away when he switched to redline so we will see.

Will update y'all once I swap over the fluid and a few days after.
 

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