d3 cat lost power need help

[CATCRACKER]

i have a d3b cat dozer that lost power last sat. i was pushing trees that where blown down during katrina and while pushing i hear a loud snap and lost power and got a nasty vibration in the engine and transmission. the engine is fine it seems to be in the transmission. my first thought was the uv joint but it is still spinning. i was able to move the machine a little bit by lowering the idle real low and putting in gear and it would catch just barely and move the machine but then it would break free and lose power and start making a thumping sound. could it be the uv joint? the shaft that its connected to is real short and cannot fall out if a joint where to give up the ghost. if it was the flywheel or flexplate i would not be able to crank it. if it was a input shaft in the transmission i would have not power at all. ?



it either:

converter

uv joint



any ideas out there.



oh yea the machine will not move forward at all but will barely move in reverse sometimes when what ever is broke catches but then it break free again. #@$%!

 

[n7gxz]

Catcracker,



I'm trying to relate your discription of your D3 to my D2. The uv joint you're talking about, is that your shorthand for univeral joint? Does the D3 use a u-joint between the torque converter and the transmission? If the u-joint went then the to yokes would be hitting each other. Since you say the machine moves in reverse then I don't see it being the converter. Is the transmission a manual shift or a hydromatic? I'm thinking that your broke something inside the transmission.



Kevin

 

[CATCRACKER]

it was the uv joint on the bevel gear... the one i could not see. it wipped out the shaft. damage: two uv joints, 16 bolts and 2 inch shaft gonna run $267 bones. . of which i am glad to pay. . thought it was the trannyOo.



thank for the help

 

[n7gxz]

Sounds like you missed what could have been a very expensive bullet.



Sounds like the new D3 is setup a bit differently then my D2. transmission and bevel gear housings are one unit and the output shaft connects directly to the bevel gear pinion.



Have fun,

Kevin