hi guys i have broke 4 4l60 in 8 months i have all the good parts in it you name it its there. i am looking at get 400 and gearvenders overdrive ,will that work with long lubes,and how do i get the speedo. to work and are there any tricks. OR i might try and 200r any help would great and thoughts also.
THANK YOU steven gsx@hotmail.com

 

What engine specs are you running and who are you gettting the trans rebuilt by?

 

for now just bolt ons but in 2 months i am get a sortblock with my le 2 heads and healthy cam .i am hoping to put 430 hp and 390tq on the wheels .local guys building for now.
steven gsx@hotmail.com

 

 

What keeps "breaking"?? Either A) your tranny builder isn't very capable, or B) you need a new transmission ... I don't mean another re-build ... I mean get a completely new ("new" to you) tranny. My Dad is a mechanic, and he's explained from his experience that if a tranny fails prematurely just once, then it's more likely to fail again prematurely than a tranny that holds together for a long time.

I've put ~75,000 kms (~45,000 miles) on my '02 since I've owned it, been to the track several times, had 2.73's, 3.73's, and now 4.10's in the back, raced/romped on the car a lot, and I now have a B&M shift kit in it (previously used the Hypertech tranny firmness increase) and it's still holding together?! (*knock on wood* ))..... there's no reason your bolt-on LT1 should have killed 4 trannies on only 8 months!?

Have you talked to any of the builders on this site? There are a couple regulars who really seem to know their stuff about 4L60E's ... I'd talk to Frank (12SCNDZ) at CPT, or ProBuiltAutomatics before doing a TH400 swap + gear vendors ... can you say "lots of work and lots of money"?!?!

 

GV is a great unit, no big problem getting the speedo to work with a TH400. But a good TH400, TC, driveshaft, and a GV are gonna run at least $5K-6K. Sounds like a properly built 4L60 is the way for you to go.

Rich

 

i keep tearing up pumps ,z packs.i have trans cooler, i just got the trans back 2 days ago ,if it goes again i dont what to do because the 1st time it broke on the 140 ,xxx miles the planteries went through the case that was scarey it sounded like a 7 mil. gun going off ,since then pumps, z packs . the trans has the 5 gear plant. vett servo,hearderd sprag,race clutchs,2500 stall ,shift kit and i forget what else.
thanks guys
steven gsx@hotmail.com

 

sounds like you need to find a new tranny builder. There are plenty of people running 4l60s with much more power then you are.

 

I have 15k on my setup and I drive hard. Find a new tranny man!

 

do you shift it manually?

that may explain some of the trouble...

 

I shift manually sometimes and my tranny still hasn't blown up (yet!!).

 

The GV is probably going to interfere with your Y-pipe. I lost mine when I installed the TH400/GV combo. Just ran pipes straight back from each collector, problem solved.

The tailshaft of the GV ends up right over the g-load brace. It will require that you relocate the DS loop. I have the Spohn TA, and he had to make me up one with the DS loop bout 12" back on the arm, rather than on the front mount. And yet another expensive DS to buy.

The speedo isn't a problem, the sensor just moves to the GV. The GV also comes with a weight penalty. The only OD ratio available is 0.78 so that's not going to drop the rev's as much as a 4-sp O/D atomatic. I was running close to 4,000rpm in 3rd gear with the TH400, at 70mph and with street tires. The GV dropped it closer to 3,000rpm..... still on the high side.

http://cjcfo.fbody.com/members/injun.../DCP02954a.jpg

This was a mockup of the TA mount to check the clearance. You can see the stand for where Spohn normally mounts the loop:

http://cjcfo.fbody.com/members/injun.../DCP02957a.jpg

Finished TA and exhaust:

http://cjcfo.fbody.com/members/injun.../DCP03675a.jpg

 

Has anyone tried the gv with a 4l80e? It's certainly overkill for that setup but it would still be nice. Let's see here:

T56 w/ 3.42s -> .5 x 3.42 = 1.71
4L80E w/ GV & 4.10s -> .75 x .78 x 4.10 = 2.40

The T56 will turn about 1500 rpms at 60, so with the 4l80e and GV with that ratio you could turn about 2100 rpms at 60.

No, it's not cheap or easy, but I just thought I would throw that out there anyway.

 

I have a gearvendors behind a 4l60E.
Had to turn the adaptor over 180 degrees because of the speed sensor but otherwise it fit well.
After I put my 3.73's in I loved the acceleration and feel of the car but felt it needed another gear since it was turning 3000 rpm at 80 mph with stock height tires.
Now I have an A4 +1 or A5.
The gv will drop the rpms by 650.
Right now with 1 inch oversize tires and the gv engaged my rpms are about 1900 at 70 and 2200 at 80, 2500 at 90 and 2800 at 100.
My final ratio is 2.04 or put another way my 3.73 becomes 2.91 which is very close to the stock 2.73 highway gears.
I used the Jegs short torque arm kit with the plate that bolts in the transmission tunnel.
I cut and modded my stock torque arm and mount and sold the jegs arm to someone building a 3rd gen race car as the jegs arm was too noisy for me.
Although the gearvendors is expensive and extensive in the work for installation its the best of both worlds for a daily Auto driver, having drag gears when you want to go and highway gears when you want to cruise.
An M6 conversion would be cheaper but after 7 or 8 manual cars over the years the pain of shifting gears overcame the fun and theatrics of dumping it and letting it go.
I'm very pleased with having the extra gear.

 

oh the stock OD is .70 not .75.