3VOLUTIONIST
Probationary Member
- 27
- 5
- Sep 28, 2014
-
Perth, Western Australia,
Australia
Hey guys!
So i'm building my box at the moment and I've just run through and done a set of solder crush tests using soft 3mm solder as instructed by the transmission service manual. This box had seen ~80 thousand miles before I removed it due to the crankwalk bolt stripping the thread out of the bellhousing.
Ive replaced the bellhousing with a spare out of an RVR that spat the front diff out, so I thought it best to check all the bearing preloads..
I fitted new bearings to the front differential (fitted a quaife) and also to the input and intermediate shafts. Retained the old bearings on the output shaft to the transfer case, and the centre differential.
This is what I got from my tests.
Front diff:
56Thou
55Thou
Average: 0.0555”
Spec: 0.002”-0.0067” ENDPLAY
Required shim thickness
0.0488”-0.0535”
1.24mm-1.36mm
My old shim:
0.036” (0.914mm)
Applicable Shims
MD710458: 1.28mm
MD710460: 1.37mm
Output shaft to transfer case:
62Thou
62Thou
Average: 0.062”
Spec: 0.003”-0.005” PRELOAD
Required shim thickness
0.065”-0.067”
1.65mm-1.70mm
My old shim:
0.056” (1.42mm)
Applicable Shims
MD724335: 1.64mm
MD724336: 1.67mm
MD724337: 1.70mm
Input Shaft:
53Thou
53Thou
Average: 0.053”
Spec 0.004”-0.007” PRELOAD
Required shim thickness
0.057”-0.060”
1.4478mm-1.524mm
My old shim:
0.032” (0.813mm)
Applicable Shims
MD710461: 1.43mm
MD710462: 1.46mm
Intermediate Shaft:
55.5Thou
56.5Thou
Average: 0.056”
Spec: 0.005”-0.007” PRELOAD
Required shim thickness
0.061”-0.063”
1.55mm-1.60mm
My old shim:
0.040” (1.016mm)
Applicable Shims
MD720948: 0.80mm (x2=1.60mm)
MD712331: 1.43mm (Thickest Shim)
Centre Differential:
58Thou
57Thou
Average: 0.0575”
Spec: 0.005”-0.007” PRELOAD
Required shim thickness
0.0580”-0.0645”
1.47mm-1.64mm
My old shim:
0.051” (1.29mm)
Applicable Shims
MD718524: 1.49mm
MD718525: 1.52mm
MD718526: 1.55mm
MD718527: 1.58mm
MD718528: 1.61mm
MD718529: 1.64mm
Thoughts?
The intermediate shaft result is a bit concerning. Considering it implies I need a thicker shim than Mitsubishi ever designed. Yet its in-line with the input shaft and centre differential measurements (coincidence?)
So i'm building my box at the moment and I've just run through and done a set of solder crush tests using soft 3mm solder as instructed by the transmission service manual. This box had seen ~80 thousand miles before I removed it due to the crankwalk bolt stripping the thread out of the bellhousing.
Ive replaced the bellhousing with a spare out of an RVR that spat the front diff out, so I thought it best to check all the bearing preloads..
I fitted new bearings to the front differential (fitted a quaife) and also to the input and intermediate shafts. Retained the old bearings on the output shaft to the transfer case, and the centre differential.
This is what I got from my tests.
Front diff:
56Thou
55Thou
Average: 0.0555”
Spec: 0.002”-0.0067” ENDPLAY
Required shim thickness
0.0488”-0.0535”
1.24mm-1.36mm
My old shim:
0.036” (0.914mm)
Applicable Shims
MD710458: 1.28mm
MD710460: 1.37mm
Output shaft to transfer case:
62Thou
62Thou
Average: 0.062”
Spec: 0.003”-0.005” PRELOAD
Required shim thickness
0.065”-0.067”
1.65mm-1.70mm
My old shim:
0.056” (1.42mm)
Applicable Shims
MD724335: 1.64mm
MD724336: 1.67mm
MD724337: 1.70mm
Input Shaft:
53Thou
53Thou
Average: 0.053”
Spec 0.004”-0.007” PRELOAD
Required shim thickness
0.057”-0.060”
1.4478mm-1.524mm
My old shim:
0.032” (0.813mm)
Applicable Shims
MD710461: 1.43mm
MD710462: 1.46mm
Intermediate Shaft:
55.5Thou
56.5Thou
Average: 0.056”
Spec: 0.005”-0.007” PRELOAD
Required shim thickness
0.061”-0.063”
1.55mm-1.60mm
My old shim:
0.040” (1.016mm)
Applicable Shims
MD720948: 0.80mm (x2=1.60mm)
MD712331: 1.43mm (Thickest Shim)
Centre Differential:
58Thou
57Thou
Average: 0.0575”
Spec: 0.005”-0.007” PRELOAD
Required shim thickness
0.0580”-0.0645”
1.47mm-1.64mm
My old shim:
0.051” (1.29mm)
Applicable Shims
MD718524: 1.49mm
MD718525: 1.52mm
MD718526: 1.55mm
MD718527: 1.58mm
MD718528: 1.61mm
MD718529: 1.64mm
Thoughts?
The intermediate shaft result is a bit concerning. Considering it implies I need a thicker shim than Mitsubishi ever designed. Yet its in-line with the input shaft and centre differential measurements (coincidence?)
