3-15. PROPELLER SHAFTS TROUBLESHOOTING
TEST OR INSPECTION
1. EXCESSIVE DRIVE SHAFT NOISE.
Step 1. Check drive shafts and support bearing for insufficient lubrication,
wear, or damage (indicated by excessive movement between universal
joint and drive shaft in any one direction).
I f d r i v e s h a f t s o r s u p p o r t b e a r i n g i n s u f f i c i e n t l y l u b r i c a t e d,
lubricate (refer to LO 5-3805-262-12).
If drive shafts or support bearing is worn, bent, or damaged,
replace (page 6-34, 6-41, or 6-45).
If drive shaft is lubricated and not worn, bent, or damaged, go
to step 2 below.
Check splines on shafts and yokes for wear or damage.
a. If splines are worn or damaged, replace shafts and yokes (page
6-34, 6-41, or 6-45).
b. If splines are not worn or damaged, go to step 3 below.
Step 3. Check transmission and differential yokes for loose mountings.
Tighten loose mountings (page 6-37, 6-42, or 6-46).
2. EXCESSIVE DRIVE SHAFT VIBRATION.
Check drive shaft for bent or sprung condition.
a. If drive shaft is bent or sprung, replace (page 6-34, 6-41, or
6 - 4 5 ).
b . I f d r i v e s h a f t i s n ot
Step 2. Check support bearing for
a . I f s u p p o r t b e a r i n g is
b . I f s u p p o r t b e a r i n g is
Check for loose universal
w a r e.
bent or sprung, go to step 2 below.
wear and damage.
worn or damaged, replace (page 6-41).
not worn or damaged, go to step 3 below.
joint or support bearing mounting hard-