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My 86 full size Bronco is grinding in reverse and park slips. This only occurs in 2wd, 4hi. 4low is fine. I believe that the problem is my t-case. My truck has been sitting for awhile due to the driver side front wheel spacer breaking which cause me to dig the front end in the ground. Impact was hard enough to bend stock radius arm and curled radius arm drop bracket into drive shaft and make my tranny drain all th fuild. Since then I’ve replace transmission pan gasket(fixed the leak), replaced the drop brackets with superlift super runner arms. And the superlift steering kit( cause why not). I just started driving my truck again maybe 100miles and no park and bad grinding nosies in 2wd also has a burning smell but my fuild is perfect as I just replaced it. Any thoughts or suggestions would be appreciated!
 

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Discussion Starter #4
When going in to park it still rolls( on my steep driveway). While rolling it makes a clunking noise. In 4low it parks and stays put.
 

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Update:2wd drive is grinding as well. Transfer case was bone dry I put roughly 2qs in and still couldn’t feel with my finger.
 

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Discussion Starter #6
would a rebuild kit from broncograveyard.com fix my problem? id like to buy a used one then rebuild broken one to eventually put back in. 1000$ for a already refurbished np208 seems outrageous to me, id rather rebuild it myself and get a used one in mean time to boot scoot n boogie
 

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95 Bronco, 351W, E4OD, 4.56 gears, 35x12.50x15 Patagonia MTs.
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242 Posts
You clearly have a parking pawl issue. I should have replied to this last week
 

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95 Bronco, 351W, E4OD, 4.56 gears, 35x12.50x15 Patagonia MTs.
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Which transmission do you have? I'm just a ford nerd, but I can help find some documents if you want.
 

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Discussion Starter #13

Which transmission do you have? I'm just a ford nerd, but I can help find some documents if you want.
im pretty new to this forum, imma have to put my info in my signature. but i have a 86 351W HO C6 transmisson
 

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95 Bronco, 351W, E4OD, 4.56 gears, 35x12.50x15 Patagonia MTs.
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242 Posts
If it grabs just a bit, 4 low gives you ~2.7 times more leverage against the tires, it sounds like you have partial pawl engagement all the time?
 

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Discussion Starter #15
interesting... that would be my transmisson and not my transfer case? im definitely not a drive train expert. specialty concrete by trade!
 

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95 Bronco, 351W, E4OD, 4.56 gears, 35x12.50x15 Patagonia MTs.
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242 Posts
interesting... that would be my transmisson and not my transfer case? im definitely not a drive train expert. specialty concrete by trade!
The symptoms would lead me to believe something happened to the engagement part of that mechanism, unfortunately it is well tucked into the transmission. I could picture a rounded pawl causing your issues. The slipping when in park is a dead giveaway. If the t case slipped, it wouldn't allow you to drive at all. I don't think it's the transfer case, those typically have chain failure and stop transmitting power.

Another neat video, this may help diagnose the issue?

Another edit: research is showing that an out of adjustment shift linkage could also be part of the issue. Verify the linkage at the trans is fully engaged in park position? c-6 Transmission shift pattern - Ford Truck Enthusiasts Forums
 

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Discussion Starter #19
i really appreciate your input, i cant wrap my head around the fact that it parks reverses and drives in 4wlow
. how is that? also how much would the repair be if i dropped the transmission and brought it to a mechanic for rebuild,approximately?
 

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95 Bronco, 351W, E4OD, 4.56 gears, 35x12.50x15 Patagonia MTs.
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It's usually $1500ish for a stock type rebuild in my area. If it's not slipping when driving, you could probably ask them to only fix whats broken, but clutches and stuff are going to be removed anyways, so you'd only really save on parts.
 
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