TH400 or 4L60e suggestions...
#1
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TH400 or 4L60e suggestions...
I really need some help. I can't quite make up my mind whether or not to go
a3 or a4. I have a pretty serious street machine and i like to go to the track at least 5 times a month on slicks. I drive it about 200 miles a week and like to take some long trips 100 miles each way. I have 4.10's in there and about 700rwhp and i need something reliable and street friendly. Any suggestions would be greatly appreciated.
a3 or a4. I have a pretty serious street machine and i like to go to the track at least 5 times a month on slicks. I drive it about 200 miles a week and like to take some long trips 100 miles each way. I have 4.10's in there and about 700rwhp and i need something reliable and street friendly. Any suggestions would be greatly appreciated.
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The reason I said 80 is because of the miles you drive weekly. It is basically a th400 with an over drive and a lockup torque converter. To answer your original question at 700rwhp I think you will be best with a th400 over the 60. Vince
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1. Im sorry but TH400 would be INSANE! It would definitely hold the power but... I have a TH400 in my TA with 3.73's, 4k stall. On the freeway 60mph-65mph is about 3k rpms in 3rd. Talk about HEAT!
2. 700hp and a 4L60... good luck with that. I dont think it will hold. My buddies car is about 500hp and he has been through 2 4l60's all motor. Now has a 4L80. But you might be able to find a heavily built one.
3. IMHO I think the 4L80 is your best option. It will be strong enough to handle the power, but will have overdrive so you can actually use it on the freeway.
1. Im sorry but TH400 would be INSANE! It would definitely hold the power but... I have a TH400 in my TA with 3.73's, 4k stall. On the freeway 60mph-65mph is about 3k rpms in 3rd. Talk about HEAT!
2. 700hp and a 4L60... good luck with that. I dont think it will hold. My buddies car is about 500hp and he has been through 2 4l60's all motor. Now has a 4L80. But you might be able to find a heavily built one.
3. IMHO I think the 4L80 is your best option. It will be strong enough to handle the power, but will have overdrive so you can actually use it on the freeway.
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You need a new yoke, you can use the 4L60E or T56 driveshaft.
You need some tuning changes, and minor wiring modifications, i.e. repinning a connector.
You need a 4L80E specific converter.
Using a TH400 you really would want to add an electronic speedo setup, $250-300. It uses a specific crossmember, longer driveline, same yoke as the 4L80E.
So you have a bit more initial investment in the 4L80E (approx $500) but the car will be much more driveable with the OD, lockup converter, PCM controlled trans, and the resale value would offset the cost difference, not to mention fuel savings over time vs. the TH400.
The 4L80E fits and installs easily, just need to clearance the floor brace for the electrical connector and possibly ding the tunnel for cooler lines.
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It's not that hard to do as Jake's Performance stated. I did the swap by myself in the driveway. There are a couple of people selling 80 setups in the classifieds - basically everything you would need to do it. You could piece it all together yourself though. Mine will be up for sale soon too (only because I miss shifting gears and don't hit the track often).
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Just now seeing that you are located in Indiana. You might want to hit up RPM to price out a conversion for the 4l80E. They are in Indy and I believe they will pick up and deliever your car if you ask nice! They do this type of work all the time and it is another option for you if you can not do it yourself. Vince
#20
I had to be talked into it at first.. I thought i was going to have to beat my tranny tunnle to hell and have all kinda of fitment issues.. I was mistaken. If your pushing 700RWHP and want a real DRIVEABLE street car, 4l80E and never look back!!