Question about 1983 GMC C1500

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Chevy turbo 350 auto transmission

Where to make vacuum hose connections,from tranny to engine.where to where?

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Trans modulator valve to engine manifold vacome. A good source is usualy right behind the carb.

Posted on Jan 10, 2009

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1988 Chevy V8 5.7L 350 4bbl . My vin starts with 2GBJG31M9J4 . it is a RV jamboree with the chevy 1 ton heavy duty emission. does anyone know where I can find a vacuum diagram?


Vacuum Diagrams - AutoZone

www.autozone.com/repairinfo/.../repairGuideContent.jsp?page...

AutoZoneGM Chevy Mid-Size Cars 1964-1988 Repair Guide ... Fig. Fig. 4: 1971 V8 enginevacuum hoses ... Fig. Fig. 12: 1976 350 V8 engine-4bbl with EFE and AIR injection systems .... Fig. Fig. 52: 1980 5.7L V8 engine-automatic transmission federal. images for 1988 Chevy V8 5.7L 350 4bbl vacuum ...

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My 72 Chevy C10 has a TH 350 transmission that will not shift automatically. I have to manually shift from L1-L2-D.


Check the hose going to the modulator. If that doesn't fix it, you might want to try another modulator

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Will a 454 turbo transmission bolt to a 350 big block engine?


yeah this will work....most 350 big blocks come with either a 350, 350 turbo or 400 turbo transmissions.....bolt pattern is the same

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How do i connect a wrangler speedometer to a turbo 350 transmission


Your factory tach won't be accurate because a 350 is an 8 cylinder engine. I put a 350 into a Vega, and my speedo was slightly off because of the differences between the ratios as well. I recommend looking for an aftermarket adapter, or a kit if you can't get the cable to connect into the tranny.

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Will a 1988 chevy scottsdale transmission enterchange with earlier model transmissions like 1983 or 1984 with 350 or 305 engines


Three different transmissions could be in either the 88 or the 83 or84. The 4 speed auto 700r4, the 9 inch tail t-350, or the 9 inch tail t-375. as long as it is the same type transmission, they will interchange. The 4 speed 700r4 has some internal internal differences between the years, but will still work. The 350 or 375 trannys are identical from that year range.

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Do you know where i can find a 'vacuum diagram' for a turbo 350 transmission (1980 chevy blazer...stalls when you put it in gear)


There is usually only one vacuum connection on a turbo 350. It connects to the modulator valve on the side of the transmission. This valve uses engine vacuum to determine transmission shift points. The other end usually connects to a direct engine vacuum source. A "direct source" is a hose connection on the throttle body that has a vacuum signal available at idle. If it doesn't, then it's considered a "ported source".I have had some experience with the chevy blazer/gmc jimmy series, both the early large body models and the small body versions. The stalling when put into gear complaint is most likely caused by a bad intake gasket which is common on the older versions with the small block V8 motors. The newer versions with the vortek motors also had allot of trouble with throttle body gaskets. If these problems have not already been addressed, then there's a good chance that it will take care of the problem. Other possible sources of vacuum leaks are the pcv hose that is hard and brittle. Check the hose out carefully, especially the side that normally faces the engine. Check the throttle body bolts (carburetor bolts) for tightness. I hope that this information is helpful to you. Thank you for using Fixya.com.

Jun 07, 2011 | 1985 Chevrolet S-10 Blazer

1 Answer

Wanna know if i can put a tranny for basic 1995 riviera in my Supercharger


you will most probably need a beefed up tranny to take the power of the engine, I have just installed a 350 supercharged chevy motor in my sons car with a Turbo 350 transmission and a shift kit which I have been told by an auto trans mechanic may not take the power of that engine.
It is costing him $1500 australian to have it reconditioned so I hope it will survive the rides

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