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Is it the Sure Grip going out..... #2563641
10/13/18 11:57 PM
10/13/18 11:57 PM
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New Mexico
UCUDANT Offline OP
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Today I had a buddy fly in from out of town. We had the Cuda loaded with 4 pax. It felt different on the unshift, not like a 500lb difference kind of like the clutch was little soft on upshift but you know it's not the clutch....

I then rotated the tires. Just as I finished this service a newer Stang comes along. We "admired" the Mustang who was "admiring" us, we ended up impressing him more than he impressed us grin . I still knew we had more he would have liked normally it was just seemed to be lacking all of a sudden. It was falling short.

I drove it again by myself hr's later it seemed ok until I left a light and maybe let out the clutch hard, I almost thought I dropped the drive shaft. It did nada. It gave out completely. If I tried to drive/left/accelerate real soft staying under 1500 rpm it "broke free" or let go.

Sounded like the banging upon accel attempts/failures came from the diff.

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2563648
10/14/18 12:09 AM
10/14/18 12:09 AM
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Supercuda Offline
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If a Sure Grip quits griping it acts like an open differential.

Sounds like something broke and not the SG being wore out.


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They say there is always the exception that proves the rule.
Don't be the exception.
Re: Is it the Sure Grip going out..... [Re: Supercuda] #2563697
10/14/18 01:20 AM
10/14/18 01:20 AM
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Wichita
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Cone or clutch sure-grip?

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2563707
10/14/18 01:41 AM
10/14/18 01:41 AM
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Lincoln Nebraska
RapidRobert Offline
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Quote:
Sounded like the banging upon accel attempts/failures came from the diff.
X2 (what Supercuda said), time to pull the pig.


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Re: Is it the Sure Grip going out..... [Re: RapidRobert] #2564017
10/14/18 07:33 PM
10/14/18 07:33 PM
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God's Country Maryland
GODSCOUNTRY340 Offline
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Sounds like you tore teeth off the ring gear.


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Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2564084
10/14/18 09:54 PM
10/14/18 09:54 PM
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New Mexico
UCUDANT Offline OP
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It's a clutch type

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2564101
10/14/18 10:08 PM
10/14/18 10:08 PM
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Posts: 14,889
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Supercuda Offline
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I once swapped the gears on an 8.8 that had a clutch type limited slip. Every ear was tore off the discs and nary a sound. No limited slip action either.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2564376
10/15/18 01:19 PM
10/15/18 01:19 PM
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Wheatfield, NY
Cuda340 Offline
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Spider gears in the sure-grip unit could have broke teeth off as well.

Re: Is it the Sure Grip going out..... [Re: Cuda340] #2564619
10/15/18 10:23 PM
10/15/18 10:23 PM
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New Mexico
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Originally Posted By Cuda340
Spider gears in the sure-grip unit could have broke teeth off as well.



Thanks all, I suspect mechanical damage. It could be the centerforce clutch but I didn't hear or feel anything up front or through the pedal. I won't have time to look at it tonight, I have to take my buddy to the airport shortly. I'll try tomorrow, or it will have to wait until Saturday.

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2567068
10/20/18 09:27 PM
10/20/18 09:27 PM
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New Mexico
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I was trying to wrap my head around how the diff would become "open" when it the sure grip tried to couple both axles..... the bolts that hold the halves of the suregrip unit together are coming out (if they are not actually broken too). The spider gear shows some damage as well. My 741 3.91 gears are in great shape thank goodness since they don't make them.

Sure grip bolts.jpg
Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2567069
10/20/18 09:36 PM
10/20/18 09:36 PM
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Kirkland, Washington
Pacnorthcuda Offline
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Originally Posted By UCUDANT
I was trying to wrap my head around how the diff would become "open" when it the sure grip tried to couple both axles..... the bolts that hold the halves of the suregrip unit together are coming out (if they are not actually broken too). The spider gear shows some damage as well. My 741 3.91 gears are in great shape thank goodness since they don't make them.


Holy sheet! Can you post a pick? Sounds like the whole diff unit is trash.

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2567070
10/20/18 09:40 PM
10/20/18 09:40 PM
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New Mexico
UCUDANT Offline OP
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I edited to add a shot as you were posting

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2567071
10/20/18 09:42 PM
10/20/18 09:42 PM
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Posts: 21,808
Kirkland, Washington
Pacnorthcuda Offline
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Wow, that's too bad. Hate to see a clutch unit bite the dust. Wonder what the root cause was...

Re: Is it the Sure Grip going out..... [Re: Pacnorthcuda] #2567074
10/20/18 09:44 PM
10/20/18 09:44 PM
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New Mexico
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I think it might be rebuildable, I'm sure the spider gears and even shafts are available through Cass?

I told a buddy it was losing "coupling" when the sure grip centrificaly attempted to apply and know it makes more sense.
I was hammering on it earlier that day.

Re: Is it the Sure Grip going out..... [Re: UCUDANT] #2569254
10/25/18 08:57 AM
10/25/18 08:57 AM
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Posts: 8,128
New Mexico
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I've been busy, been out of state for a few days, one of my kids totaled her car (she is fine)...... It has just had to wait. Anyway a quick look in and I need gears

Dr Diff is the man, my parts are on the way. He had the SG parts on hand and at half the price of a well known competitor....... I could have bought a whole new unit from Dr Diff (Cass) for what the other guys wanted for just the parts. THANKS Cass







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