International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > Off-Road FSJ Tech

Thread Tools Search this Thread Display Modes
Old 12-15-2009, 09:43 PM
TINMAN93's Avatar
TINMAN93 TINMAN93 is offline
Join Date: Apr 28, 2004
Location: Bella Vista Arkansas
Posts: 167
Tranny trouble

Agreed, diagnosis is important. But I also believe that if it breaks, fix it stronger.
As far as this tranny history goes: The first rebuild was basic one after 120k miles or so. The second was a mild upgrade with a shift improver kit, and quality parts. That lasted about 4 years before I blew up the converter, and broke the transfer case in half. That probably didn't help it's case.
This time we went with a TCI converter and deep pan, custom valve body upgrade and premium parts. I also rebuilt a 229 to replace the cracked unit. I blew it up on a hill at SMORR at few years later. Come to think of it, i blew a front hub out on that same hill. Anyways the converter went south, as well as all the cluthes so this time we went with a custom heavy duty converter, bolt in sprag assembly, clutches, custom filter set up and other goodies he thought of. I thought my tranny woes were done, but after only 3 times out, I blew it up again at Superlift. My tranny guy says the converter survived, but that the guts in the back let go destroying the inside and the case.
I'm still going to upgrade to the 400/300 setup, but for now he's building an all new 727 to hopefully get me by long enough to gather all the parts to do the gear box upgrade correctly.
And again, this thread has been a great help.
Thanks to all contributors.

- '91 SJ: BoB'd 13", Lift Hatch, Sliders, Tackbar & more DIM toys.
- And, He who dies with the most toys, still Dies!
Reply With Quote
Old 10-29-2010, 08:49 PM
amcpsycho2's Avatar
amcpsycho2 amcpsycho2 is offline
Gear Head
Join Date: Mar 06, 2010
Location: Wahoo,NE
Posts: 309
Originally Posted by TINMAN93
This is a great thread. Just what I've been looking for.

I've had some 727 issues and a geared T-case has been in the plans for a while so when my third 727 blew up at Hot Springs in Sept, I'm thinking Upgrade!

I have a line on an AMC Hydro400 that I'm planning to use with a Novac adapter. I had thought of going the 205 way,even a divorced one to have equal length shafts, but I like the 300 weight and gearing better.

The issue is I have a Driver side front D44. I didn't read where this was noted in any of the posts.

Has anyone put a H400 with a D300 clocked for a driver side dump?

Or is it somewhere in the post and I missed it?

You do have the downshift linkage adjusted properly/correctly?More problems with the Torqueflites are related to improper downshift linkage adjustment.Correct placement of downshift linkage relates to proper operating pressure>=failed tranny's.
You say psycho like it's a BAD thing!

Some days it's just not worth chewing thru the restraints!
Reply With Quote
Old 03-04-2011, 10:28 AM
RIS RIS is offline
New Member
Join Date: Oct 07, 2009
Location: Kiln, Ms.
Posts: 7
My buddy Travis is running one with a stock 360 and he hasn't had a problem. He's always doing front digs and it is wheeled hard.

Reply With Quote
Old 06-03-2011, 05:01 PM
youngjeeper's Avatar
youngjeeper youngjeeper is offline
FSJ Maniac
Join Date: Jan 24, 2003
Location: Atlanta GA
Posts: 3,663
Just threw one in the Choptop w/727. It's a tight fit. Will post pics this weekend. Probably making a square driveshaft.
88' GW Stock & Mint
77' CJ-7
Choptop/Crew Cab Build-up
Reply With Quote
Old 05-11-2012, 08:59 PM
youngjeeper's Avatar
youngjeeper youngjeeper is offline
FSJ Maniac
Join Date: Jan 24, 2003
Location: Atlanta GA
Posts: 3,663
Originally Posted by youngjeeper
Just threw one in the Choptop w/727. It's a tight fit. Will post pics this weekend. Probably making a square driveshaft.

The CV joint will not fit. This is the alternative that was made. We'll see how it holds up. If it doesn't work will have to go with a very skinny tube.

88' GW Stock & Mint
77' CJ-7
Choptop/Crew Cab Build-up
Reply With Quote
Old 06-24-2014, 12:48 PM
jeepin87's Avatar
jeepin87 jeepin87 is offline
232 I6
Join Date: Nov 27, 2007
Location: Alamogordo, NM
Posts: 70
85' CJ10a LT1/NV4500/D300

I broke the stock rear output, upgraded to 32 spline and did a 4:1 kit at the same time. No issues yet. If I break a couple more components i may go Atlas and save this case for my Cherokee.

I'll post picks as soon as they're done loading up.
Lots of rigs, parts, and lost knowledge.
Reply With Quote
Old 06-25-2014, 12:32 PM
Sambo's Avatar
Sambo Sambo is offline
FSJ Maniac
Join Date: Sep 25, 2001
Location: new mexico,carlsbad
Posts: 3,585
im still running the same d300, which now sits behind a np231(madrooster setup)for 4-1. not a problem yet!
77 chero DEAD.
84wag,360,tf727,???! possiblities are d300 flipped and a ford d44 hp with coils
Reply With Quote
Old 10-05-2015, 07:49 PM
backroadin''s Avatar
backroadin' backroadin' is offline
350 Buick
Join Date: Aug 11, 2004
Location: Vermont
Posts: 950
I have one in my waggy. It's behind a stroked six and a t176, with a d30 front. Pretty sure it's the strongest part of my whole rig!!!
"Roads? Where we're going we don't need roads." -- Dr Emmett Brown

"When this baby reaches 88 miles per hour, you're gonna to see some serious sht!"

73 Wagoneer - 4.6L Stroker (yeah baby!!) t176/d300, 3.73's, 33" muds, 4"spring lift, 2" body. Offy dualport w/ Quadrajet, pertronix, flowmaster.
Reply With Quote
Old 12-05-2015, 07:20 PM
dahwillys dahwillys is offline
Join Date: Dec 01, 2015
Location: nevada
Posts: 13
I have a D300 behind a 550 h/p v8 with 38" tires and one tons. It also has a 4:1 kit along with twin sticks. If yours broke, something wasn't right to begin with. It's the strongest case out there, minus an Atlas, and can be built almost as tough. My 2 cents anyway ! lol
Reply With Quote
Old 12-05-2015, 09:06 PM
Mcgyver's Avatar
Mcgyver Mcgyver is offline
Join Date: Oct 22, 2015
Location: Huntersville NC
Posts: 23
Originally Posted by Mahamotorworks
I want to get a D300 and use it when I finally brake my QT. I will have some time before that happens.


same here qt in great shape but leaks everywhere.
Reply With Quote
Old 12-22-2015, 01:06 PM
Bill Moore's Avatar
Bill Moore Bill Moore is offline
Bleedin' Gasoline
Join Date: May 22, 2006
Location: Alabama
Posts: 2,139
Have d300 in both Cherokees, ones running stock 360 and other 4bt Cummins. another will go behind a 4bt cummins in my sons J10 build soon.
67 KJ715 4bt AA OD 465 np205
78 J20 Chevy 305 nv4500 np205


Sons Build 1980 short bed J10, j20 axles, 4bt, nv4500, np205, shortened M715 bed and fenders

Freedom is not Free, it is paid for with Blood
Reply With Quote
Old 12-22-2015, 06:09 PM
rocklaurence rocklaurence is offline
Join Date: Jan 14, 2009
Location: 33812, Lakeland, Fl
Posts: 1,811
Anyone consider rotating the D300 up a few degrees in order to run the CV front drive shaft?
Reply With Quote
Old 01-18-2021, 09:58 PM
madmikeX3's Avatar
madmikeX3 madmikeX3 is offline
258 I6
Join Date: Jul 23, 2009
Location: Denver, NC
Posts: 338
Got one in my stock 360 Cherokee behind a NV4500. Runs great.
Just Empty Every Pocket
1980 Jeep Cherokee W/T
Nice Jeep Bro!!!! Do some Jeep Stuff!!!!.

Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 08:33 AM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
corner corner