OSGiken Diff Thump
#1
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Thread Starter
Join Date: May 2011
Location: Gaithersburg, MD
Posts: 52
Total Cats: -2
OSGiken Diff Thump
Just had a new 949 Giken diff installed in the car along with new bearings, seals, and the proper fluid. The diff seems to operate properly while on track. However, when I make a tight turn at low speed (say 2nd gear) I hear a thump thump noise coming from the rear of the car. The axles and wheel bearings are relatively new. I don't see any unusual play in the drive shaft or axles. Has anyone with a Giken diff had a similar experience? Any ideas?
#2
Just had a new 949 Giken diff installed in the car along with new bearings, seals, and the proper fluid. The diff seems to operate properly while on track. However, when I make a tight turn at low speed (say 2nd gear) I hear a thump thump noise coming from the rear of the car. The axles and wheel bearings are relatively new. I don't see any unusual play in the drive shaft or axles. Has anyone with a Giken diff had a similar experience? Any ideas?
Is this after sessions?
#5
You need to replace the fluid. Any time the giken makes those noises, change the fluid. (Im assuming it was installed correctly. Contact Ben at Puddy Mod Racing with any questions about your install, break in, maintainance...)
Also, dont waste your money on the giken fluid, motul 75w\140 is half the price and works well.
There is a very specific break in procedure, then you change the fluid. IIRC 20 minutes of low speed 10-15 mph tight figure eights, and 200 miles, on a brand new giken, or new clutch packs, then change fluid.
Also, dont waste your money on the giken fluid, motul 75w\140 is half the price and works well.
There is a very specific break in procedure, then you change the fluid. IIRC 20 minutes of low speed 10-15 mph tight figure eights, and 200 miles, on a brand new giken, or new clutch packs, then change fluid.
#6
Junior Member
Thread Starter
Join Date: May 2011
Location: Gaithersburg, MD
Posts: 52
Total Cats: -2
Diff has ~10 miles road driving and 30min on track. Thump noise was very noticeable when I drove the car around the paddock 30 min after being on track.
What I was told prior to purchase:
What I was told prior to purchase:
Ready to go after install, but will have a short break in period, no specific procedure.
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