DTT tranny question

[MattyB4x4]

I have found a CTD ram that I want to buy and it has a DTT tranny w/ a 91%TC. I am not real familiar with auto tranny's and was wondering how this tranny would work out under towing conditions...under 10k.

Thanks for the help

[speedo]

DTT makes a quality product and you shouldn't have any problems towing. The only thing that might be a concern is that when you get stuck in stop and go traffic it is possible that you might get the tranny hot because the torque converter is much more efficient than a stock tc. The tranny will be fighting the brakes when you are stopped and will start to build up heat. I would recommend that you have a tranny temp gauge and when you're in a stop and go situation just put it in neutral when you're stopped.

Gus

[EarlKann]

Usually the 91% is used more by comp pulling rigs / drag racers (yes they drag race diesels) and the 89% more for towing. That doesn’t mean that you can’t tow with a 91%, it just may build up a little more heat. If it is a full DTT trans (I have just the torque converter) then it is a quality piece and you shouldn’t have any trouble. Make sure you have a gauge and monitor the temp as Speedo suggested.

[MattyB4x4]

Ya, it is a full DTT tranny. I really think the first thing I would do is buy an aux. tranny cooler and gauge.

[MattyB4x4]

Now here is another question...would you rather have the nv5600 or a full DTT tranny? My concern now is fuel mileage as this truck would be my DD.

[EarlKann]

Ya, it is a full DTT tranny. I really think the first thing I would do is buy an aux. tranny cooler and gauge.

Good deal. Those DTT trannys are not cheap by the way. Also get a deep trans pan, mag-hytec or other, for increased fluid capacity.

[DutchTJ]

I have found a CTD ram that I want to buy and it has a DTT tranny w/ a 91%TC. I am not real familiar with auto tranny's and was wondering how this tranny would work out under towing conditions...under 10k.

Thanks for the help
have at it :D

[BigDan]

I also had a full DTT tranny and never once did they recommend a aux tranny cooler....probably because a DTT is soooo improved over stock it wont need it. Its true a 89% is more suited for your needs but a 91% will do just fine. The 91% hold's just 2% more power. A lot of people use a full 100% with the use of a lock up switch. The 91% isn’t for all out racing, its more for higher HP trucks.

The 93%Race is used for pullers and drag racers.

Also Ive had both NV5600 and a full billet DTT. They both performed awsome it just depends if you like banging through 6 gears or leave it in drive. I'm now going back to a NV5600 in my new truck because I dont like spending $5,000 on a tranny that can handle 450HP+

[MattyB4x4]

gotcha big dan...ya, it's got a deep pan already. One more thing, this goes to big dan...because you said you've driven both. I can only assume that you got better fuel mileage with the nv5600?...What were you getting with the DTT?

....can't beat bangin through the gears though...haha

[Eskimo]

If it has 4.10 gears, the 91% is just fine...

I don't think DTT will let you build a full trans without the Mag-hytec pan.. and I'd be REALLY surprised if the truck didn't have the normal 3 (or 4 for a 24V) set of gauges.. Boost, pyro, trans temp, and fuel pressure...

Sounds like a good truck.. I'm happy as hell with my DTT, and the customer support is second to none.

Oh, find out if it has the billet input/output shafts.. that's $1300 alone!

[ddp1]

The 91 TC will work fine for towing. As for better mileage, either will probably be the same. For a DD truck, the auto will be more enjoyable in heavy traffic.
No, a Mag-hytec pan is not required on every DTT tranny.
The DTT tranny will jerk your load down the road, without a sweat. It's not the same as a 6 speed(nothing is), but it will make your towing setup 100% better than a stock auto.
In the summer at stoplights you may need to pop it into neutral, if your sitting there for a long time. An Aux cooler is not required, it won't overheat, just dissipate more heat from the tighter TC. A trans temp gauge helps monitor it, too.

Enjoy the new truck.You can call DTT with the original owners name, who built the tranny and get a complete profile of what exactly is in that trucks setup. We do it for every truck.

[weedwacker]

I have had a 91 and now 89%. I was pulling about 13k and on 285 tires with 3.54 gears. I like the 89 to get a heavy load to roll,seems like the truck is working less to get going with the 98. I called Bill K about my concerns after installing the 91 and he sent me an 89. I think I am at about 400-450 HP. If you have a 4x4 I would think about getting the 91 and then get a 2 wheel low kit. You could run the 91 then use the 2 low to get rolling when towing a heavy load. If you are worried about heat make sure your check valve near the heat exchanger is out. Bill also told me that one main reason for the trans pan is to keep the stock transmission case from distorting under load.

[BigDan]

I dont really log mileage but its about the same. A DTT will give you better MPG's over a stock auto. The NV5600 has a lower 6th gear then an auto. .67 vs .69 IIRC. I actually prefer the DTT over the NV5600. The NV5600 will keep me out of trougble since im not into driving fast eversince my accident. Auto's are much quicker in acclearation over a 6speed.

[ddp1]

Dan, you got that right, you have to work to shift that fast in the 6speed.

In my 2000, I started with a 91, then a 93, then the 89 when I sold it. I also had a cam in it, so the 93 with an HX40 and DD3's pulled regularly with it. I'm not saying it is ideal, but it did work. The 89 is by far the best choice for a towing setup. You guys do realize they aren't using that number reference any longer at DTT.

[Eskimo]

You guys do realize they aren't using that number reference any longer at DTT.

No kidding? What do they call it now?