Blowing tranny fluid all over.

[Scott & Heather]

Drove from Kansas City to Cicero Indiana. Coach ran fine and then we get the final mile and she just doesn't want to go...Trans seems to just not be engaging. We pull into our destination and she's leaking a decent amount of my expensive golden juice all over the pavement. It's sprayed all over my toad too. It appears to be coming from the side of the tranny pan but I can't tell for sure. Anyone have any common places a hose or something might fail that I can start chasing down? We need to get this coach home to Michigan Sunday next week. 1992 MCI 102C3 with Allison ATEC 748 trans.


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[luvrbus]

Probably blew the 0=ring out of the modulator lol or you lost the modulator,you have a neutral and a backup lite switch on the sides just above the pan that can blow apart too   

[Scott & Heather]

Ok sounds fun. I'll be crawling under there tomorrow. can someone tell me definitely whether I can fill the tranny with 15w40 thus mixing the motor oil with the transynd? I need to top it off but I refuse to pour that expensive juice in for it to all blow out again while I get it to a place I can work on it.


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[luvrbus]

No you cannot mix it suck it up big guy and spend the money 

[Scott & Heather]

Lol. Nooooo! What about dextrin iii???


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[chessie4905]

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2067804

[luvrbus]

I hear the new Dexron Vl I think is compatible but it cost 6 bucks a qt at W/M ,lol never could understand why you guys used the Transynd in the older transmission to began with I am a 15/40 guy myself  

[Geoff]

I use Universal tranny Hyd fluid which is a 10w-20 Hyd oil mix.  A 5 gallon bucket fills the tranny and filter.  Never a problem, and reasonably priced.

[chessie4905]

Lol, yeah the guys that use synthetic oil in their vehicles and then change it every 3 to 5 thousand miles.

[pabusnut]

"Lol, yeah the guys that use synthetic oil in their vehicles and then change it every 3 to 5 thousand miles."

I resemble that remark, but my 255K VW TDI loves it, and so does the original turbo.  Very cheap insurance.

[Scott & Heather]

So I got under there and determined that it is the lower transmission cooler line hose that goes from the pan to the coolant heat exchanger. It appears to be old and sad. So I am pulling it today and going to try to find a place that can make me a new one.


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[thomasinnv]

The service literature on my b500 says its ok to mix the synthetic and non synthetic trans fluid, but you have to follow the service intervals for the non. I definately would not mix trans fluid and motor oil though. I can't think of any intelligent reason you would want to mix any different fluid types besides an emergency situation, or changing from standard to synthetic.

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[luvrbus]

The service literature on my b500 says its ok to mix the synthetic and non synthetic trans fluid, but you have to follow the service intervals for the non. I definately would not mix trans fluid and motor oil though. I can't think of any intelligent reason you would want to mix any different fluid types besides an emergency situation, or changing from standard to synthetic.

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Even with a B500 you are not married to a synthetic fluid only if it is in warranty,I have a local friend that use 10w/20w in his charter buses and has for years,if it wasn't for the retarder on my B500 I probably wouldn't be running the Transyd, but I do hate changing the 2 filters and losing a 100 bucks worth of Transyd    

[edvanland]

Scott most NAPA stores make hydraulic hoses

[eagle19952]

Like Chevron's web site, most lube brands will have a compatibility chart OR a Contact # to get the straight scoop..

I would choose that option.