Ford diesel ZF5 manual transmission with single mass flywheel

[408FishStick]

That is gear rollover noise you have at idle. Get rid of the 10W-30 because the detergents will eat your synchro's, replace it with 2 gal of 30 wt synthectic ATF.

[PepperDarlington]

@fordtangfanatic The bellhousing patterns and gear artios are different. I've heard of people installing a gasser ZF5 in a diesel but the gear spread is not ideal.

[408FishStick]

@PepperDarlington It is possible but it has to be from a 460 for the bell housing to be even remotely the same size. Any small block or I-6 trans will not work with a 460 or diesel engine (6.9,7.3, 7.3 PSD) because the bell housing is too small

[FORDGTFANATIC]

is it a 4x4? also a zf? please post a vid of 4x4 low in first gear at idle?

[TWeatherford88]

@FORDGTFANATIC Yes it is a 4x4 ZF5. I don't have a video camera currently but if your wondering the rattle is pretty loud in 4 lo. Right around 5-600 rpm is where mine rattles bad, everything sounds normal. In 4 lo its common to idle along in the 5-600 rpm range though, and it sounds pretty bad. Its normal though, and won't cause any problems.

[FORDGTFANATIC]

@TWeatherford88 any idea if the zf-5 speed from a gas engine will fit and work with the diesel?

[DTOMUSA74]

@FORDGTFANATIC No it wont.

[peter69133]

that wat i have on my 88 ford f350 same tranny but on a gas truck

[TWeatherford88]

I had a worn injection pump and mismatched injectors in this video, after replacing all of that it quieted down quite a bit. Now you can just barely tell its got a SMF from outside or inside, most people wouldn't notice anything different.

[sitdwnandhngon]

That seems pretty prevelant. I need to replace the DMF on my truck. How loud is that rattle compared to engine noise when you are just standing next to it?

[TWeatherford88]

It is bolted together, welding would likely cause it to be out of balance.  The noise is the gears chattering against each other due to the torque spike created by a higher compression diesel at low speeds. Normal, and not a problem.

[truckndiesl]

weld that sucker together