TH350 gearbox NO DRIVE!!!

HI people
i own a 1953 chevy pick up when i built it i had the gearbox reconditioned which of our own fault failed so i brought a brand new tci th350 and a brand new tci convertor which is barely 6 months old now this last week ive lost all drive in every gear now ive took the oil cooler lines off and we have no oil pressure there what so ever? the splines etc are fine after taking the gearbox out for inspection but cant find anything obvious that could be wrong could this be the pump? or the convertor that has gone?

any help would be greatly appriciated

ross

 

Yeah , unfortunately it sounds like it might very well be another TCI failure. Sounds like the pump went. Call or E-mail where you bought it and try that route. good luck

 

thanks is this quite common then of tci ? for failures for a pump to be sent from tci to england is about 150 pounds which about $300 which i suppose isnt to bad if it is the pump but need to know whats gone wrong before i order a new 1
thanks for your input

 

seems there has been tci problems and depending on where and when you bought it, it may still be under warranty. 300 bucks seem awefully steep for a pump to me but I could be wrong . Are there any shops there that could properly diagnose the problem? Before I spent the money I'd check that out.

 

well we brought it from a company over here which is a big american car truck type company which deal in every american car wise and they got it shipped over to england the gearbox woz up to like 700 pounds which is just over a thousand dollars so it works out about 230 dollars for the new pump but will look into some one having a look at the pump as the gearbox is already out of the truck but again
thanks for your help

 

could be the pump , but since it's so easy to do i suggest you check the filter first to see if it isn't plugged up

 

that was the first thing we done last week put a new filter on it and fresh oil but still no drive when we took the gear box out today i noticed that the torque convertor still had the old oil in and non of the new oil as its a different colour so again does this point to the pump as its not getting in to the convertor?

 

yeah, it kind of points to the pump. But it's really difficult to diagnose these things 10000 miles away...

 

Chevytrucklad Sorry for your trans problems. Here is a transmission shop name for you to direct questions to.Very reputable. Rossler's Transmission Inc. 1 Rossler Drive Girard Ohio phone is 330 530 5000 ask for Carl. Good luck!

 

thanks guys for your input much appriciated if any one else can shed some light on it would be greatfull

thanks again

 

you have pm

 

quick question on the install, was the convertor filled with ****** fluid and ever working fine with levels checking out, running down the road? you said its 6 months old right? just trying to help ya out here.

 

yeah we filled it up to what it said i think woz 1 quartz since it was installed it had been fine pulled hard never missed a beat until last week when it seemed to start to slip which then we thought were the clutchs going when ya reved it it would leap forward then stop again as though there was oil starvation and then after that we had nothin, when we got it back we took he oil lines of an turned it over ran it, went through the gears but there woz no oil comin out of any of the trans cooler lines no pressure wot so ever i took the gearbox out yesterday to inspect it and i did notice that after we changed the oil etc there was no fresh oil in the convertor just the old oil (which was a different colour to the new oil) which then indicated to me that the pump wernt working what are your thoughts on this?

 

could any one else shed any light on my prob before i take the plundge ans buy something i dont need
any help would be great

 

As long as you weren't low on fluid,and the filter was clean, I say It's the pump. 99.9% sure.

 

I would call TCI.

 

thanks guys the only major problem is that it dont have no warranty with it as we had it shipped over to england but thanks for all ya help
much appriciated

 

ive emailed tci now as i couldnt find there email address any where god know how much phoning them would cost from england but ill wait for a email back and see what they say thanks again for all ya help

 

does any one know of or have heard for torque convertors pulling out of the pump drives?

 

I suppose that could happen if the flexplate (flywheel) was on backwards. The pads where the convertor bolts on should stand out towards the converter.

 

that yours 1950ChevySuburban? very nice i dont think it is on back wards its been fine for the last 6 months or so it just suddenly happened no noise or nothin just lost all gears

 

not very likely IF it is bolted up properly to a SBC (small block chevy) , unless there is something we don't know about. did you seat and engage the converter into the pump? did the engine/transmission bolt together easy , or did you just force it together? that could cause damage

when the converter is properly installed into the ****** and pump , there will be a small gap of about 3/16 " between the converter and the flexplate that you have to pull the converter forward to flexplate

or do you have it mounted to a different with an adapter? the adapter could be wrong

this is a long shot...you don't happen to have a rear mount mount plate between the motor and transmission ?

 

yeah we mounted the convertor on to the gearbox before we put it in im quite sure it was on properly no its just mounted exactly how any other car would be or truck its getting to be quite a head ache as we havent a clue why its done this
again thanks for your input guys as they say 2 heads are better than one or in this case many heads
thanks guys

 

You say the fluid in the convertor was a different color? If the is any discoloration to the fluid you have burned some clutches. Take it apart. It sounds like you are prepared to replace the pump, that's almost half the job. Get yourself a clean bench, camera, tags w.h.y. and strip it down. Put a long drift tightly in a vise and hang the trans off it. You'll need regular hand tools and a internal snap ring pliers. PM me for more details if you wish

 

I had that happen on my turbo 350,The splines stripped out of the torque converter,hard to tell by looking,trans shop had a tool to ck the splines with and the were bad.Converter was a reman and not very old.

 

If you aren't getting any cooler flow, you definately blew up a pump. If you need any guidance on checking it out feel free to pm me. You can pull the pump and take it apart and see for sure. The stator support and pump body need to be smooth where the gears ride.