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Dana 70 spitting out some shims
- Thread starter Spudwrench
- Start date
total newb
senior jerk ass
Hows the lash and lateral?
Loosen caps. Tap back in, check lateral, if tight run it.
Loosen caps. Tap back in, check lateral, if tight run it.
These 1/8" thick ones should be the outermost shim...
Then those thin ones can't possibly wiggle out.
Dana 70 Carrier Bearing Spacer / Master Shim .120
Product Details: Pinion bearing spacer / master shim Installed under the inner pinion bearing race / cup 4.125" shim OD 3.480" shim ID .120" thick Parts Included: (1) shim Fits: Dana 70 axles Brand: Dana Spicer Part Number: Dana Spicer 34848-28 Warranty: 6 month warranty and case by case basis.
downtofab.com
Then those thin ones can't possibly wiggle out.
Spudwrench
Well-known member
Well it was impossible to get them back in. they are damaged. these are really thin, stack of 4 on each side. The spacer above would be way to thick.
i found this information:
Carrier-bearing Preload
Definition: See pinion-bearing preload
Think of it as: How tightly the carrier-bearing cones are pressed into their cups and consequently how stiff they are to rotate. Also controls how tightly the carrier is held in the housing.
How Measured: Not possible to measure directly.
Adjusted Via: Adding or subtracting an equal amount of carrier-bearing shims to both sides of the carrier. Ideally, total carrier shim stack (sum of both sides) should be approx. 0.015” larger than the available space, and a case spreader should be used. However, a case spreader is not critical, and a good approximation of carrier-bearing preload can be made by ensuring the carrier can only be installed with a few good blows from a dead-blow hammer.
Note: If carrier preload is too little, carrier will move away from pinion under load (squirm or deflect), increasing backlash. This could lead to insufficient gear tooth contact, resulting in chipping/breaking of gear teeth.
So if I order a case spreader and this kit:
5424551
SHIM KIT - Diff and Pinion Bearing Shim Kit
4.125 inch OD
3.650 inch ID
I should be able to install equal amounts both side for a tight fit. Am I on the right track?
i found this information:
Carrier-bearing Preload
Definition: See pinion-bearing preload
Think of it as: How tightly the carrier-bearing cones are pressed into their cups and consequently how stiff they are to rotate. Also controls how tightly the carrier is held in the housing.
How Measured: Not possible to measure directly.
Adjusted Via: Adding or subtracting an equal amount of carrier-bearing shims to both sides of the carrier. Ideally, total carrier shim stack (sum of both sides) should be approx. 0.015” larger than the available space, and a case spreader should be used. However, a case spreader is not critical, and a good approximation of carrier-bearing preload can be made by ensuring the carrier can only be installed with a few good blows from a dead-blow hammer.
Note: If carrier preload is too little, carrier will move away from pinion under load (squirm or deflect), increasing backlash. This could lead to insufficient gear tooth contact, resulting in chipping/breaking of gear teeth.
So if I order a case spreader and this kit:
5424551
SHIM KIT - Diff and Pinion Bearing Shim Kit
- Fits DANA 70B and DANA 70HD
4.125 inch OD
3.650 inch ID
I should be able to install equal amounts both side for a tight fit. Am I on the right track?
- Joined
- Nov 4, 2022
- Member Number
- 5724
- Messages
- 106
I'm guessing someone rebuilt the diff and the kit came with the wrong diameter shims. It should have the smaller diameter shims that go between the carrier and bearings.
total newb
senior jerk ass
A lot of kits come with external shims because most people cant handle pulling bearings off repeatedly.
If they were tight then id say it was good on setup. Races will turn and spin eating the cast iron external shims or the casing. Prob rotated enough to push them out.
If they were tight then id say it was good on setup. Races will turn and spin eating the cast iron external shims or the casing. Prob rotated enough to push them out.