Rebuilt 47RH Dies after 4 miles.

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deerefanatic

Always learnin...
Joined
Aug 27, 2011
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Ok guys, So after much studying I undertook my own tranny build. My 95 had an NV4500 in it (which I hate) and I'm going over to auto. So, I picked up a 2wd 47RH from a guy that needed rebuilt. (My trucks a 4x2). Took it apart. Rear clutch was burned right up, to the point that I couldn't get the input shaft and rear clutch drum separated from the front planetary ring gear. Finally got it apart. Tranny had NO filter in it at all and was a black slime mess inside. Ordered a new drive shell, ring gear, and rear clutch drum.

I took the entire tranny apart. The cases were washed out with degreaser and aluminum cleaner. (Napa aluminum brightener). All the reused hard parts were washed in a gasoline bath, then rinsed with brake cleaner and wrapped in new shop towels to dry and stay clean.

I bought DTT parts for the tranny. I've learned to regret it. I'm disappointed to say that the service has been less than stellar and after getting my rebuild kit and having to source some things myself, it would have been cheaper for me to go with Goerend (who I've dealt with in the past with great results). But, enough of that.

I bought:

DTT TripleDisc converter
DTT Valvebody Kit
DTT Billet Apply Arm, strut, anchor
DTT Billet 2nd gear servo
DTT Billet accumulator piston
DTT rebuild kit (which did not include torringtons, or even a trans filter. Had to source these myself)
DTT Billet Flexplate
Sonnax Billet Input shaft

New rear clutch drum, front planet ring gear, drive shell, torrington bearings, shim kit, rear clutch pressure and reaction plates, and filter from Wittrans.com

5 Gallons of JD HyGard Low Viscosity from the local Deere Dealer.

I put it all together. I had the endplay on the low end of the spec, but within spec. The front (direct) clutch was around .065 - .070 inches clearance. The Rear (first gear) clutch was only around .018 inch. Bill at DTT assured me this was correct, that they are supposed to be tight. Seemed strange to me, but ok.......

Took it out and drove it a mile or so and drove nice. Didn't really get into it much. Hooked on to a trailer as I had to take a piece of equipment to an auction. First real time to go anywhere. Ran good, got into overdrive with lockup. My twins seemed like they were weak (AFC isn't fueling for some reason.... Had the motor out fixing oil leaks when I did the trans this weekend) So I stopped at an intersection and popped the hood to make sure all the boost lines and stuff were hooked up. Slammed the hood, jumped in the truck, and nothing.....

Long story short, If I start the truck and put it in gear, I've got about 30 seconds of forward or reverse till the filter gets clogged with $h!t...... Oil is burned and coal black. Iron shavings growing like a fur coat on the pan magnet. WTF happened? I did a pressure check tonight on the accumulator port. In D1, I have about 120psi at cold idle for about 7 or so seconds before the gauge goes wacky and drops to zero over the course of the next 20 seconds..... Shut it down, wait a bit and repeat.. Tells me that when the filter ain't plugged, she's got good hydraulic pressure...

Any ideas are greatly appreciated. I'll prolly pull it down tomorrow afternoon after I get my customers duramax done...
 
I just put a 48re together from dtt seems my experiences where the same way with them. Bill seemed nice, my front clutch came out the same .018. I also used Goerend before but this customer wanted to be cheapier and I will never use them again. Hopefully I dont have the same problem. Sorry I cant help guess you need to get Bill on the phone. No filter,drill bits for shift kit and i didn't get directions for the shift kit had to have them emailed, a month and half to get parts.
 
120psi at idle sounds high. should be 70-80psi with DTT's kit from my experience.
 
Sorry to hear that guys. I know there are other good tranny builders out there, but i feel my money will always go to goerend. He has been nothing short of awesome when i have dealt with him and his parts are top notch.

One of the main things about DTT that got under my skin was that he used to have a whole thread up on his site about how a triple disc converter would rattle itself apart and wear the clutches out over time. Basically it was to bash the other trans manufacturers that used them. He said there was no way a multi disc could be reliable like a single disc, etc... They now have deleted that thread and are building triple disc converters themselves. :doh:
 
Yah. I never checked the line pressure after I assembled the trans till I was having problems. BUT, hi pressure shouldn't cause the trans to burn up I wouldn't think.....

Oh, and No, DTT is not building triple disc converters themselves... My converter came in a box from a warehouse in Georgia...... That's a long way away from Canada.

Goerend customer for life now.... My customer's Georend trans runs beautifully! My trans, not so much.....
 
After all these tranny stories about folks "going cheap" and in the end spending nearly three times as much. screw that. Chris hooked me up with a full race Goerend, I'm sure I won't be disappointed!

In one hour I'm on my way ti Iowa to drop of the truck! w00t!
 
deerefanatic said:
Yah. I never checked the line pressure after I assembled the trans till I was having problems. BUT, hi pressure shouldn't cause the trans to burn up I wouldn't think.....

Oh, and No, DTT is not building triple disc converters themselves... My converter came in a box from a warehouse in Georgia...... That's a long way away from Canada.

Goerend customer for life now.... My customer's Georend trans runs beautifully! My trans, not so much.....
Click to expand...

A guy i know just had an issue like yours but he caught it way faster. I think he said he found that he had swapped the throttle valve with another valve....

I have good and bad things i could say about DTT, but in your case id figure out what is the issue before condeming them. my .02
 
JasonCzerak said:
After all these tranny stories about folks "going cheap" and in the end spending nearly three times as much. screw that. Chris hooked me up with a full race Goerend, I'm sure I won't be disappointed!

In one hour I'm on my way ti Iowa to drop of the truck! w00t!
Click to expand...

Nothing but Goerend is used here! I love being his neighbor!
 
I didn't have good luck with the DTT VB kit. Not saying it was the kits fault, but I double and triple checked everything and still had weird issues. Went back to an OEM VB and all issues are solved.
 
mathews8pt said:
A guy i know just had an issue like yours but he caught it way faster. I think he said he found that he had swapped the throttle valve with another valve....

I have good and bad things i could say about DTT, but in your case id figure out what is the issue before condeming them. my .02
Click to expand...
Bingo.
farmboy458 said:
goerend or forget it....
Click to expand...
Shut it. And use the shift key.
 
Could the 2nd gear band have been dragging? I got mine too tight on an adjust and it bound up on the first run out.
 
I'm hoping to get time tomorrow afternoon to pull the tranny down and get to the root of this. I adjusted the 2nd gear band according to the instructions in the DTT shift kit... tighten to 72 in/lbs and then back off 1-7/8 turns.

I did find out some interesting info though....... DTT buys their converters from DPC... And there is I see an ongoing debate about DPC. I've been told by more than one person so far that I'm likely to find the inside of my tranny fine, and the oil pump and reaction support shredded. Guess we'll see what we see.....

All I can say is; if it's the converter, I'm not pissin' around with DTT anymore. It's gettin a Georend converter (which I can actually get cheaper...I was tempted to go that route in the first place, but thought it'd be best to "keep it all one brand")

Stay tuned........
 
And for those wondering, I am running a DTT billet flexplate.....

And no, I had very little converter to plate clearance......
 
The converter is NOT your problem, don't even go there... I know of over 100 DPC converters installed by reputable builders without any clearance issues.

I would check to make sure the bolts that fasten the stater support to the pump didn't loosen up on you.

The clutch clearances are ok, check mainline pressure.
 
Dosent matter what state country or even city a package comes from dealers have parts floating around all over . Just bc it said Georgia dosent mean its a dpc converter. Unless it said so on the box or dtt told you that's what it is . Also on another note I see you only have 4 posts not saying I have a lot eather but it seems that you are already pointing your finger at your converter . So in fact are you just someone trying to start chit ? If not hope you have luck finding your problem and get it fixed.
 
Dpc builds converters for dtt and there was a huge thread about the possibility of dpc's converters having issues, although there hasn't been any proof if it. So, you can see how he might think that.

Sent from my DROIDX using Tapatalk
 
I see.. I read the threads and all the posts on cf and seen no reason to show a bad converter on dpc's behalf . However anyone can paint a converter blue purple black red whatever color it may be and pass it off in photos as something its not .(reference to the converter threads)
 
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