Help/Too much torque for the 727?

How they work, how they don't work, and how to fix them

Moderators: Greenleaf, BC847, Richie O

Help/Too much torque for the 727?

Postby Flanra » Tue Apr 17, 2007 9:27 pm

Well a friend of mine needed a dumpster moved and thought my 1stgen couldn't budge it. So I pulled out the chains and in the process of moving the dumpster I heard a loud bang... A few moments later I see a nice sized puddle of ATF under the truck and I have seemed to take a chunk out of what I am guessing is the tailshaft of the trans. Its where the tail end of the transmission bolts to the cross member on the frame. It seems like theres a casing bolted on to the trans with 4 bolts and then goes into the transfer case. Does anyone know if I can order that piece, drop out my transfer case and just slip a new one on? or do I gotta pull the whole tranny?

A powerstroke guru that I know said to me... see what did I tell you, them cummins are junk... All I could to is laugh and say "Nope engines fine, It just has that much torque"
1990 1st gen, 727 auto, starwheel bottomed, fuel delivery rate adj. fuel screw turned, 4" exhaust/stacked, pyro/boost 35# @ 1250*... 3" lift 36" tires...

http://s119.photobucket.com/albums/o151/flanra/Truck/
User avatar
Flanra
fuel screw!!!!
 
Posts: 26
Joined: Tue Jan 16, 2007 9:13 pm
Location: Beaver County, PA

trans

Postby ccab85 » Tue Apr 17, 2007 9:39 pm

Hopefully it is only the adapter from the tranny to the transfer case. you could order one or check online or in the classifiieds. Sounds like a classic case of "If we were in my truck we could do it" I used to play this game all the time, now I just sit back and watch the mis-informed try to prove something.
91.5 W350 345k stock
ccab85
fuel screw!!!!
 
Posts: 43
Joined: Sun Apr 15, 2007 7:55 pm

yep

Postby Flanra » Wed Apr 18, 2007 1:27 pm

Yeah, thats all it was. The adapter from the trans to the transfer case...

$318.00 from mopar... and there is only 40 left :( I guess that means I can't play cowboy much anymore..
1990 1st gen, 727 auto, starwheel bottomed, fuel delivery rate adj. fuel screw turned, 4" exhaust/stacked, pyro/boost 35# @ 1250*... 3" lift 36" tires...

http://s119.photobucket.com/albums/o151/flanra/Truck/
User avatar
Flanra
fuel screw!!!!
 
Posts: 26
Joined: Tue Jan 16, 2007 9:13 pm
Location: Beaver County, PA
Top

Postby PToombs » Wed Apr 18, 2007 4:38 pm

IIRC, you can pull a small 1/2 x 3" cover on the (top?) of that piece, and there is a snapring under there. If you spread that, the rear housing comes off. I could be wrong, it's been a long time since I broke the tail on my Charger! :wink:
pete

Just enough power to break everything behind the crankshaft.
User avatar
PToombs
14mm rotor
 
Posts: 11367
Joined: Sun Jan 07, 2007 6:13 pm
Location: Syracuse NY. Snow central!
Top

Adapter

Postby ccab85 » Wed Apr 18, 2007 6:06 pm

Try Advance Adapters they may have one for less money
91.5 W350 345k stock
ccab85
fuel screw!!!!
 
Posts: 43
Joined: Sun Apr 15, 2007 7:55 pm
Top

Postby dazedandconfused » Thu Apr 19, 2007 1:42 pm

I hope that is all you broke. Yes take the two bolts out of the cover plate, spread the snap ring and the tail should come off. I had problems breaking the back half of the housing out when I had my first gen. I went through seven and then parted it out.

Andy
Big Andy
1983 Dodge D150 that has been repowered with a 93 Cummins/518 running gear AKA The Ugly Duck! I would much rather build them then buy them.[
User avatar
dazedandconfused
14mm rotor
 
Posts: 6119
Joined: Thu Apr 05, 2007 6:25 pm
Location: Walton, Kentucky
Top

Postby seeker1056 » Thu Apr 19, 2007 3:43 pm

Before you pull anything again what you need to do is to put a tiedown on the front of the motor to the frame so under severe torque the motor cant try to lean over.

Then underneath you should make sure your tranny mount is in good shape.

And on the Dodges I beleive there is not a bracket fro mthe frame so that it holds the lower end of the transfer case so it cant rotate over.

You need to fab one with sum rubber for vibration..

These little fixes will make it so u never break that adapter again.
Been there done it got the Tshirt
91 F350 5.9 Cummins, Custom built VE 12v

Sponsors of new truck

Performance Diesel Injection
Colt Cams
H&H Offroad
Arties Transmission
Toms Contracting
seeker1056
14mm rotor
 
Posts: 506
Joined: Tue Mar 06, 2007 7:19 pm
Location: Lakefield Ontario Canada
Top

...

Postby Flanra » Sun Apr 22, 2007 9:36 pm

Where should I put the tie downs at on the engine? Yeah.. I was planning on pulling a sled or two this summer but after this I am afraid too because stupid isn't cheap... :D
1990 1st gen, 727 auto, starwheel bottomed, fuel delivery rate adj. fuel screw turned, 4" exhaust/stacked, pyro/boost 35# @ 1250*... 3" lift 36" tires...

http://s119.photobucket.com/albums/o151/flanra/Truck/
User avatar
Flanra
fuel screw!!!!
 
Posts: 26
Joined: Tue Jan 16, 2007 9:13 pm
Location: Beaver County, PA
Top

Postby PToombs » Mon Apr 23, 2007 3:47 pm

Seeker, got a pic of the shirt? :roll:
pete

Just enough power to break everything behind the crankshaft.
User avatar
PToombs
14mm rotor
 
Posts: 11367
Joined: Sun Jan 07, 2007 6:13 pm
Location: Syracuse NY. Snow central!
Top

Postby dpuckett » Mon Apr 23, 2007 9:01 pm

I'd think with good engine mounts, you should be able to pull just about anything. Mine are getting a little weak- engine rocks back and forth at shut down sometimes. Never had one do that before.

DP
His- 93 W250 club cab LE, auto to Getrag conversion, piston lift pump, 3.54 LSD. 400k+
Hers- 04 QC 4x4. Built auto, Triple Dog, Air Dog. Funny Round truck that aint so quiet.
dpuckett
14mm rotor
 
Posts: 2196
Joined: Wed Jan 03, 2007 4:33 pm
Location: Perryville MO
Top

Postby seeker1056 » Tue Apr 24, 2007 4:45 am

If ya truckpull for any length of time and get sum decent traction you will find out all about engine torque over.

The strap or link goes from upper engine head to drivers side frame. Some sanctioning bodies require chain some allow for steel strap, and some dont care.

On the cummins the three bolt holes at the front top of the head is a good spot for the upper link/bracket.
91 F350 5.9 Cummins, Custom built VE 12v

Sponsors of new truck

Performance Diesel Injection
Colt Cams
H&H Offroad
Arties Transmission
Toms Contracting
seeker1056
14mm rotor
 
Posts: 506
Joined: Tue Mar 06, 2007 7:19 pm
Location: Lakefield Ontario Canada
Top

Postby seeker1056 » Tue Apr 24, 2007 4:49 am

PS

Wouldnt surprise me to find out that engine torque over is the reason the weaker 53 blocks are splitting. Thats a lot of motor pullin over on a mount that is at the very bottom of the block, more so when one lets off on the fuel under very heavy load and you have rebound on the mounts ;o)
91 F350 5.9 Cummins, Custom built VE 12v

Sponsors of new truck

Performance Diesel Injection
Colt Cams
H&H Offroad
Arties Transmission
Toms Contracting
seeker1056
14mm rotor
 
Posts: 506
Joined: Tue Mar 06, 2007 7:19 pm
Location: Lakefield Ontario Canada
Top

Postby Fnschlaud4620 » Tue Apr 24, 2007 5:29 am

I know what your talking about, the aftermarket sell a kit for Grand National Buicks that have this same problem.

Much easier than changing motor mounts too.

good idea
1998 GMC K3500 180,000 1st gen Cummins H1E/HT60 twins PPE 435 injectors 5" exhaust 4l80e
Truck Pics: http://www.cummins-conversion.com/photo ... ppuser=556

http://s283.photobucket.com/albums/kk300/Fnschlaud4620/
User avatar
Fnschlaud4620
fuel screw!!!!
 
Posts: 209
Joined: Sun Jan 14, 2007 1:29 pm
Location: North Branch, MI
Top

Postby Begle1 » Tue Apr 24, 2007 6:56 am

I like the idea of a bracket.

Anybody have any pictures? I'd like to add it to the "things to do list", as I have some stuff I need to mount underhood as it is.
1990 D-250 Regular Cab: Tweaked injection pump, built transmission, a cataclysmic charlie foxtrot of electronics, the most intense street-ran water injection system in the country, and some more unique stuff.
User avatar
Begle1
14mm rotor
 
Posts: 1964
Joined: Sat Jan 06, 2007 5:31 pm
Location: Kihei, Maui, Hawaii
Top

Postby Flanra » Wed Apr 25, 2007 4:16 pm

seeker1056 wrote:PS

Wouldnt surprise me to find out that engine torque over is the reason the weaker 53 blocks are splitting. Thats a lot of motor pullin over on a mount that is at the very bottom of the block, more so when one lets off on the fuel under very heavy load and you have rebound on the mounts ;o)


Yeah it sure is, I honestly didn't realize how much torque these engines made until I seen the size of the peice that I broke... I couldn't Imagine having 1000 ft lb to the ground... thats why I am saving for a P7100 truck with a 5 speed :twisted:
1990 1st gen, 727 auto, starwheel bottomed, fuel delivery rate adj. fuel screw turned, 4" exhaust/stacked, pyro/boost 35# @ 1250*... 3" lift 36" tires...

http://s119.photobucket.com/albums/o151/flanra/Truck/
User avatar
Flanra
fuel screw!!!!
 
Posts: 26
Joined: Tue Jan 16, 2007 9:13 pm
Location: Beaver County, PA
Top

Next

Return to Transmission

Who is online

Users browsing this forum: No registered users and 11 guests