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78 BRONCO RANGER XLT -351M-C6-NP203 TO 205 SWAP -9IN 3.50 REAR
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Discussion Starter #1
Hi guys -It has always seemed in the 34 years of owning my 78 (truck came with the wife)-married into it-
I have always remembered having that dreadful "R" clunk!.

In all these years of ownership-blood sweat and tears I have had the>>
-Engine rebuilt-351M
-C6 rebuilt
-OEM SWAPOUT of 203 to REBUILT 205(all seals replaced Only)
-BRAND NEW -double Cardan JOINT with Driveshaft /Slip and U joints
-Pulled Carrier 9 inch-Sent out for Inspection and Backlash adjustment

-As of June 2020>>
BRAND NEW -Yukon Axles and Bearing Kits
BRAND NEW- Rear Shocks
BRAND NEW- All Rear Brakes /Wheel Cylinders /Hardware-Drums Turned
BRAND NEW- SUMMIT Center caps and Gorilla nuts**

-can someone PLEASE tell me why it still clunks when put into REVERSE???
Are they suppose to -the wife (original owner) says -"Oh it always did that?"

I'm thinking worn part in T-case or C6-that might of gotten overlooked???

ALL INPUT WELCOME!! (y)

164714
164715
 
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78 BRONCO RANGER XLT -351M-C6-NP203 TO 205 SWAP -9IN 3.50 REAR
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42 Posts
Discussion Starter #3
Normal to have some at the diff. Ring and pinion backlash is what you hear
no worries
So all you guys have it!!-and its just not mine only!!??- Ok lets hear from all 78 79 owners-Please chime in and let us know that you have the Clunk -and have learned to live with it😣 ---------thanks Gondal
 
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So all you guys have it!!-and its just not mine only!!??- Ok lets hear from all 78 79 owners-Please chime in and let us know that you have the Clunk -and have learned to live with it ---------thanks Gondal
Yes happens in my 78, was concerned at first but its normal


Sent from my iPhone using Tapatalk
 

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84 Bronco, 351w, c6, custom doubler, np208, 5.13’s, TTB44, 9”, locked f/r
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941 Posts
Everything I have with a c6 does it too
 

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1978 Bronco Ranger XLT, 400/C6 92 K documented miles &1994 Bronco,XLT 85K original miles
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1,035 Posts
I have a '78 with 93K on it and never noticed it. Now you got me thinking... I'll update this weekend when I'm home/drive it. Great ownership story.
 

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78 BRONCO RANGER XLT -351M-C6-NP203 TO 205 SWAP -9IN 3.50 REAR
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42 Posts
Discussion Starter #7
I have a '78 with 93K on it and never noticed it. Now you got me thinking... I'll update this weekend when I'm home/drive it. Great ownership story.
Thanks Desert!-let us know
 

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1984, 300 L6, smogless, manual 3speed with overdrive.
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1,592 Posts
My 86 one ton 2wd does it 460-C6 my FSB does not 300-manual
 

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I might add
My 78 used to clunk into R when it had the C6
When it got the np435 clunk went away
My 79 with the C6 clunks into R
Had a 70 Plymouth that clunked intoR it was an auto too
 

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78 BRONCO RANGER XLT -351M-C6-NP203 TO 205 SWAP -9IN 3.50 REAR
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42 Posts
Discussion Starter #11
Maybe it has something to do with the C6????-maybe it does have a bit of play -enough to cause the clunk?????
 

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my 302 w/ C6 does it, just posted about it today lol.
 

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78 BRONCO RANGER XLT -351M-C6-NP203 TO 205 SWAP -9IN 3.50 REAR
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42 Posts
Discussion Starter #14
Let me guess????- you have a C6?????
 

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The t case has backlash. The rear differential has back lash. That’s what we hear. A stick has a clutch so it’s quieter with a smoother transition.
depending on the driver
 
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