dougleonard

i have power through the engine brake switch and power through the clutch switch but no power at the heads

Thanks Rob for the steel prices. Thats Great info

I can stick the pin or the possum in Rosman NC its about 40 miles SW of Ashville on Hwy.64w. in the mountains where the dogs earn their keep.

Hi fellow members I joined a few months ago and thought I would try and learn how to post . I have been working on macks off and on for 28 yrs. not so much latley. I worked for mack dealers and branches in the early 80's through the 90's . I don't yet own a mack of my own. I some day would like to restore one of my own. I did get a chance to restore a RW721LST 1177. It has a Mack E-9 400 V-8 With a12spd trans

To many good used housings out their to try a repair such as that, I would not suggest that type of repair.

To many good used housings out their to try a repair such as that, I would not suggest that type of repair.

oops 10780 is actually a overdrive trans sorry for the miss print i'm a mechanic not a typist

The numbers you need are stamped in the left hand side of the main box

If its a TRL1076 its a five speed with 2 rear countershafts

if its a TRL10780 its a five speed with 3 rear countershafts

The truck is to old for a T2050 unless someone installed it later you can identify this trans it only has one housing

Since your truck has been changed over to a dump trk I suggest TRXL1071A This is a six speed one stick with air knob

* you have to make shore your five speed is not overdrive as this trans will slow you down to much

Here is a symbol chart to help you

TR Transmission

L Lightweight (Alum Case)

D Duplex

T Triplex

X Extended range

G Seven speed range

107 Transmission series

6 Two rear counter shafts

8 Three rear countershafts

1 Extra low range

0 Overdrive

A Air shifted rear compound