i have a cummins with a 518 transmission and i want to upgrade it. i have a shift kit and i want to get the 650 dollar goerend converter, i was wondering if i have to upgrade anything else for a 300 to 350 hp truck. i will not be towing much, mabe just 3,000 lbs once a week.
Ok the reason I asked miles. Normaly if I have to drop a trans out for any reason. It gets rebuilt.
Right now your truck is 16 years old with 145k on it. I would recommend doing a rebuild when you drop it. The trans might feel good right now. When you get into the HP range you listed in the first post. It might start having problems.
If you install a new converter now on the old trans. Remember if you have a trans failure. Its time for another new converter.
There is only one bearing in a Dodge auto. 90% of the time it is still good. The bushing are the same. Look them over real good. If you see or feel any wear replace them. If you find one with excessive wear. Look everything over real good. That trans had another problem causing that abnormal wear.
The main body of the trans is normaly good for a little over 300Hp in stock form. The converters are good for about 160HP if your lucky.
The problem is most of us bought the trucks with high milage. Without knowing what the other owners have done for routine trans maint.
The fastest way to kill a Dodge auto is to Not due routine maint. The trans filter is the issue. Of the big 3 MFG's Dodge installed the best filter in their auto's. If it is not changed on a regular bases it can cause a trans failure from blocked fluid flow. On a gasser trans you can figure about the 130k to 145k miles the trans is going to die from lack of servicing. The diesels get a little higher milage but not much.
Go by the owners manual. Every 36k change the fluid and adjust the bands.
He's right, and without knowing the history of your transmission better spend the money once.
Get a full clutch kit. It will have all the clutches and steels for the transmission. I reccomend getting the Hi Performance clutches. We use Alto Red Eagle clutches in our transmissions.
Bands, they are available with the front band having a Red friction, however the rear band is only available stock. No big deal as it is only used for reverse and manual 1.
Converter, yes, get a low stall unit, you will be much happier with it.
Put a Mag Hytec pan on it if its in the budget.
On your shift kit, don't be afraid to open the holes up a bit more than they tell you to.
1 - 17 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Dodge Cummins Diesel Forum
A forum community dedicated to Dodge Cummins Diesel truck owners and enthusiasts. Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more!