Is the TH 350 working properly
#1
65 post sport coupe w/425
Thread Starter
Join Date: Mar 2007
Location: Oregon City, Oregon
Posts: 122
Is the TH 350 working properly
Alright guys, now that I'm road worthy and driving the car I'm into some final tweaks and I'm focused on the tranny. I've got a few questions. As a reminder I've got the following power plant pushing a 1965 F-85 Cutlass:
425 (from 1967 dynamic)
rebuilt bottom up
.030 over on Egge 10:25 pistons
Federal Mogul Sealed Gap Rings (file gapped)
C heads (unported but rebuilt)
Engle JM 20-22 Cam with 110 lobe seperation
Cloyes Double Roller TIming Chain
Edelbrock Performer Intake
Edelbrock 750CFM Carb
MSD HEI Ignition (plug and play version)
NO STALL CONVERTER (STOCK)
How I can tell if it's working properly? I modified the kick down cable bracket and vacuum hose? Manifold vacuum at the Carb is 14-15hg at 650 rpms and a solid 20 at 950RPMS. I'm getting tire burning tourque through 2nd gear but concerned that I'm not shifting properly at highway speeds. Running 65-70 mph there's no downshift when I stomp on it. Is that normal? Also it doesn't seem to be downshifting correctly on the hills putting more load on the engine? Any thoughts or suggestions on what I can measure, test or do? What is normal? Sorry but looking for any tid bits that will help. Thanks.
425 (from 1967 dynamic)
rebuilt bottom up
.030 over on Egge 10:25 pistons
Federal Mogul Sealed Gap Rings (file gapped)
C heads (unported but rebuilt)
Engle JM 20-22 Cam with 110 lobe seperation
Cloyes Double Roller TIming Chain
Edelbrock Performer Intake
Edelbrock 750CFM Carb
MSD HEI Ignition (plug and play version)
NO STALL CONVERTER (STOCK)
How I can tell if it's working properly? I modified the kick down cable bracket and vacuum hose? Manifold vacuum at the Carb is 14-15hg at 650 rpms and a solid 20 at 950RPMS. I'm getting tire burning tourque through 2nd gear but concerned that I'm not shifting properly at highway speeds. Running 65-70 mph there's no downshift when I stomp on it. Is that normal? Also it doesn't seem to be downshifting correctly on the hills putting more load on the engine? Any thoughts or suggestions on what I can measure, test or do? What is normal? Sorry but looking for any tid bits that will help. Thanks.
#4
65 post sport coupe w/425
Thread Starter
Join Date: Mar 2007
Location: Oregon City, Oregon
Posts: 122
Don't remember now as I did it some time ago. Is there an easy procedure to check adjustment?
Also, tranny is shifting better as it turns out, I did have a vacuum leak in the back of the manifold where I had a fitting blanked off. The rubber cap had a crack and the leak was sizable. It seems to be shifting well now around 28 or 30 into 3rd, When I stomp on it running about 55 it will downshift. I do not get a down shift much beyond 55 or 60 though. Is that normal?
Also, tranny is shifting better as it turns out, I did have a vacuum leak in the back of the manifold where I had a fitting blanked off. The rubber cap had a crack and the leak was sizable. It seems to be shifting well now around 28 or 30 into 3rd, When I stomp on it running about 55 it will downshift. I do not get a down shift much beyond 55 or 60 though. Is that normal?
Last edited by Oldsproject; December 8th, 2008 at 06:44 PM.
#5
Don't remember now as I did it some time ago. Is there an easy procedure to check adjustment?
Also, tranny is shifting better as it turns out, I did have a vacuum leak in the back of the manifold where I had a fitting blanked off. The rubber cap had a crack and the leak was sizable. It seems to be shifting well now around 28 or 30 into 3rd, When I stomp on it running about 55 it will downshift. I do not get a down shift much beyond 55 or 60 though. Is that normal?
Also, tranny is shifting better as it turns out, I did have a vacuum leak in the back of the manifold where I had a fitting blanked off. The rubber cap had a crack and the leak was sizable. It seems to be shifting well now around 28 or 30 into 3rd, When I stomp on it running about 55 it will downshift. I do not get a down shift much beyond 55 or 60 though. Is that normal?
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