Can't get the torque converter sit all the way - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Nima** · 04-23-2018, 12:30 AM

Hi Guys:
Are the tabs on TH350 gear pump gears and the grooves on the Torque converter standard (universal)? I changed the gear pump gears since the old ones were broken off and now I can't get the converter sit all the way. The converter is not original to the car.
Any tips or tricks?

**PGSigns** · 04-23-2018, 07:02 AM

Some times I have to hold my head to the left and hold my breath. But most the time I just clock the pump gear at 3 and 9 oclock and do the same with the converter. Lets me get close and a wiggle or two will let it line up. Never had any luck just shoving it an and spinning it to get tit lined up.
Jimmy

*YoungPup1977* · 04-23-2018, 07:10 AM

Quote:

Originally Posted by Nima

Hi Guys:
Are the tabs on TH350 gear pump gears and the grooves on the Torque converter standard (universal)? I changed the gear pump gears since the old ones were broken off and now I can't get the converter sit all the way. The converter is not original to the car.
Any tips or tricks?

With the pump out of the case:
before you bolted the pump halves together did you put the pump onto the TC...as you bolt the two halves together you can put the pump body and gears onto the TC, than bolt the stator to the pump body using a alignment tool to make sure the two pump halves are aligned...than tightened the five bolts that hold the the two pump halves together....once the 5 bolts are tight, ensure the TC can turn making sure there is no binding of the gears...

With the pump in the case:
another thing you can do is take a small screw driver and try to turn the pump gears (be careful not to damage the pump seal) put the inner pump gear tabs at 12 and 6 o'clock so the tabs will line up with the TC hub (notches) as you try to install the TC onto the trans...

**Nima** · 04-23-2018, 09:20 AM

Are the pump gears are suppose to rotate easily? Because I pass use a thin screw driver to pass through the front seal, I can't easily rotate the pump gears.

**kwmech** · 04-23-2018, 11:42 AM

Did you put the drive gear into the pump correctly?, the tabs are offset

**Nima** · 04-23-2018, 12:15 PM

well, this was my first time. Based on what I have read I just have to have the dot (arrow head) on the drive gear up (facing me when I am putting things back to together). I rotated the drive gear when I placed in and rotated it and it did rotated freely but now that the pump is installed on the transmission as I mentioned about I can't rotate the gear with a thin screw driver. Is t suppose to or there should be resistance? I guess this is my main question now if the gear pump gears are suppose to rotate freely at this stage or not.

*YoungPup1977* · 04-23-2018, 05:58 PM

Quote:

Originally Posted by Nima

well, this was my first time. Based on what I have read I just have to have the dot (arrow head) on the drive gear up (facing me when I am putting things back to together). I rotated the drive gear when I placed in and rotated it and it did rotated freely but now that the pump is installed on the transmission as I mentioned about I can't rotate the gear with a thin screw driver. Is t suppose to or there should be resistance? I guess this is my main question now if the gear pump gears are suppose to rotate freely at this stage or not.

The inner gear will have some resistance when you try to turn it with a screw driver. Can you get the gear to move at all ? If you can not you may have to take the pump back out and take the two halves apart Than slide the pump with the gears in the pump body onto the torque converter to see if it goes onto the pump ok.
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*YoungPup1977* · 04-23-2018, 06:13 PM

In the pic you will notice on the pump gears, mark/dot are showing on both inner and outer gears. That’s the way both need to be installed. Notice the pump is mounted onto the tc to ensure proper movement of the gears.

*YoungPup1977* · 04-23-2018, 06:25 PM

Here in this pic it shows the pump body with the gears on the torque converter with the stator on top of the pump with the alignment tool (three hose claps). Tighten the five bolts that holds the second gear spring retainer to the stator and than rotate the pump. Does it bind and will not turn ?
The torque converter is flat on the bench. The pic was turned when it was uploaded. Thanks

Make sure the pump body o-ring is not on the pump when aligning/tightening the pump together.

**Nima** · 04-23-2018, 06:53 PM

Thank you. The gear set that I bought had a arrow head on inner gear with tabs on it but the other gear does not have any marking on it. I guess I tear it apart again. Can I use my original other gear since I just need to replace the inner gear?

*YoungPup1977* · 04-23-2018, 07:00 PM

They are sold as a set. most likely the outer gear was damaged when the inner gear was broken...best to use both new gears as a set...

Was the engine started when this happened ? Take a good look at the pump itself, where the gears ride, the pump maybe bad to....look also at the gear mating surface of the stator for damage/wear.
Also, you need to check the TC hub to make sure nothing is wrong with it....check the bushing in the pump body to make sure its not tore up in any way....try to install just the pump onto the TC without the gears first just to make sure its not the bushing holding up the TC from going into the pump.

Good Luck...

04-23-2018, 12:30 AM	#1
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,169	Can't get the torque converter sit all the way Hi Guys: Are the tabs on TH350 gear pump gears and the grooves on the Torque converter standard (universal)? I changed the gear pump gears since the old ones were broken off and now I can't get the converter sit all the way. The converter is not original to the car. Any tips or tricks? __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

04-23-2018, 07:02 AM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Can't get the torque converter sit all the way Some times I have to hold my head to the left and hold my breath. But most the time I just clock the pump gear at 3 and 9 oclock and do the same with the converter. Lets me get close and a wiggle or two will let it line up. Never had any luck just shoving it an and spinning it to get tit lined up. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

04-23-2018, 09:20 AM	#4
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,169	Re: Can't get the torque converter sit all the way Are the pump gears are suppose to rotate easily? Because I pass use a thin screw driver to pass through the front seal, I can't easily rotate the pump gears. __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

04-23-2018, 11:42 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,389	Re: Can't get the torque converter sit all the way Did you put the drive gear into the pump correctly?, the tabs are offset

04-23-2018, 12:15 PM	#6
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,169	Re: Can't get the torque converter sit all the way well, this was my first time. Based on what I have read I just have to have the dot (arrow head) on the drive gear up (facing me when I am putting things back to together). I rotated the drive gear when I placed in and rotated it and it did rotated freely but now that the pump is installed on the transmission as I mentioned about I can't rotate the gear with a thin screw driver. Is t suppose to or there should be resistance? I guess this is my main question now if the gear pump gears are suppose to rotate freely at this stage or not. __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

04-23-2018, 06:13 PM	#8
YoungPup1977 Account Suspended Join Date: Jun 2015 Location: No longer here Posts: 1,000	Re: Can't get the torque converter sit all the way In the pic you will notice on the pump gears, mark/dot are showing on both inner and outer gears. That’s the way both need to be installed. Notice the pump is mounted onto the tc to ensure proper movement of the gears. Attached Images

04-23-2018, 06:25 PM	#9
YoungPup1977 Account Suspended Join Date: Jun 2015 Location: No longer here Posts: 1,000	Re: Can't get the torque converter sit all the way Here in this pic it shows the pump body with the gears on the torque converter with the stator on top of the pump with the alignment tool (three hose claps). Tighten the five bolts that holds the second gear spring retainer to the stator and than rotate the pump. Does it bind and will not turn ? The torque converter is flat on the bench. The pic was turned when it was uploaded. Thanks Make sure the pump body o-ring is not on the pump when aligning/tightening the pump together. Attached Images Last edited by YoungPup1977; 04-23-2018 at 07:10 PM.

04-23-2018, 06:53 PM	#10
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,169	Re: Can't get the torque converter sit all the way Thank you. The gear set that I bought had a arrow head on inner gear with tabs on it but the other gear does not have any marking on it. I guess I tear it apart again. Can I use my original other gear since I just need to replace the inner gear? __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

04-23-2018, 07:00 PM	#11
YoungPup1977 Account Suspended Join Date: Jun 2015 Location: No longer here Posts: 1,000	Re: Can't get the torque converter sit all the way They are sold as a set. most likely the outer gear was damaged when the inner gear was broken...best to use both new gears as a set... Was the engine started when this happened ? Take a good look at the pump itself, where the gears ride, the pump maybe bad to....look also at the gear mating surface of the stator for damage/wear. Also, you need to check the TC hub to make sure nothing is wrong with it....check the bushing in the pump body to make sure its not tore up in any way....try to install just the pump onto the TC without the gears first just to make sure its not the bushing holding up the TC from going into the pump. Good Luck... Last edited by YoungPup1977; 04-23-2018 at 07:19 PM.



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