Question about 1984 Oldsmobile Cutlass

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Were do i connect my transmission hosse so my car

Were do i connect my transmission hose so my car could shift

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I think your talking about your transmission vacuum modulator, Get your vacuum for it from in-take vacuum, should always have vacuum, vacuum will drop as you pick up speed, and will change gears.

Posted on Jul 05, 2010


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Why won't my 97 dodge caravan auto transmisson shift as speed increases, transmission fluid level is good?

Check modulator make sure vacuum hose has vacuum present and connected at both end,s of pipe.

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What is the 1/4" auto transmission vacuum hose connected to, from the intake manifold of a 1991 ford explorer 4x4 pushrod engine?

There should be a modulator (vacuum diaphram) on the transmission. The line from the intake manifold port connects to the 1/4-inch nipple on the modulator, which directs the transmission to shift gears at a pre-determined level of manifold vacuum.

Oct 04, 2013 | Cars & Trucks

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I suggest replacing your MODULATOR VALVE on the transmission. This valve, under pressure from the engine, controls how the vehicle shifts. It is possible that the valve is good, and you just have a leak in the rubber hose that connects to the valve. I have not heard any issues from the 02' Nissan Altima about the transmission. If the valve is disconnected from the hose, you should notice some smoke either from the transmission, or under the hood by the exhaust.(NOT ALWAYS NOTICEABLE) Second, the automatic transmission has several internal components, that if one fails, can cause a cascade of issues. The TORQUE CONVERTER under cyntrifical force, converts the power from your engine, into a hydrolic pump that feeds the transmission. If this becomes clogged, the transmission will not shift correctly. A transmission flush might cure your shifting issue. During the flush, replace the transmission filter. As if his is clogged for any reason, it will not supply enough fluid to the transmission, and could cause permanent damage to the transmission.I hope this helps. Good luck.

Mar 28, 2013 | 2002 Nissan Altima

1 Answer

1997 pontiac Sunfire will not shift into gear. I can shift it by hand with the lever on top of the transmission but it still will not move. Is there a vacum modulater on this model of car?

a vacum modulator does not prevent a car from shifting into gear. Usually when a car fails to move, internal parts of the transmission break and sometimes shatter prevent the clutch pack from functioning. The purpose of a vacum modulator is to allow the transmission to shift smoothly from one gear to the next, but now on allot of cars these days transmissions are solely controlled by the computer. If you transmission does have a vacum modulator then your will find a steel vacum line from the engine going to your transmission with short pieces of hose connecting the lines together.

Jul 28, 2012 | 1997 Pontiac Sunfire

1 Answer

Transmission shift Engine has to be 2000 RPM for the Transmission to shift up you can let up it will change gears. Shifts fine hesitates very slight from direct to OD. Is 2000 RPM Normal

Check for vacuum leaks--especially along vacuum hose that goes to transmission or other hoses that connect near the port that the transmission vacuum line connects at the engine intake manifold. Please reply if you have more questions.

Sep 15, 2010 | 2004 Ford F150

1 Answer

We are looking at a 95 to buy and there are two hoses that aren't attached, they appear to go to the transmission, but when we connected them and drove the car it strarted to hesitate, runs well without...

These hoses are there to control how your trany shifts.
With out them connected the trany will shift hard.(abuply)
They should go to the MODULATOR VALVE on the trany and this helps to assist the trany to make a smoother shift.
The MODULATOR VALVE has a diaphram and may have a leak letting trany fuid into the intake of the engine.
Repacing the MODULATOR VALVE and connecting the hoses should fix the problem. Make sure there are no vaccum leaks.Good Luck

Aug 13, 2010 | 1995 Pontiac Grand Am

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1994 chevy caviler 3 speed auto will not shift out of first gear

Before you take your car to a transmission shop, first check the transmission fluid level (engine running, warm, in park, on level ground). Add fluid if necessary. Second, look for a loose shift linkage or some kind of loose hose connection. If these don't fix the problem, I am afraid you might be SOL.

Jan 11, 2010 | 1993 Nissan Sentra 4 Door

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Transmission not shifting when pressing on the gas pedal stop a deadstop.vacuum hose from transmission is still attatched to trans but is disconnected from other end.where does the vacuum hose connect to?

modulator on trans if its at bottom on trans(round object on back or side of trans case,or if on engine it connects to vacuum inlet port ir small pipe on inlet manifold ...even near carb,,,efi,really screws up shifting like youve said

Nov 05, 2009 | 1998 Ford Contour

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93 LincolnTown Car will not shift above 2nd.

Have you tried taking the car in for maintenance? Usually on most (older) auto transmissions there is a hose coming off of the exhaust manifold or carburetor area that provides the pressure for the transmission fluid. If that hose doesn't have a good seal, your shifting may be difficult and the transmission may not stay in the gear you want it to.

Nov 23, 2008 | 1993 Lincoln Town Car

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Transmission Shifting Problem, 1995 Seville with Northstar and approx. 70,000 miles

A bad IAC (idle air control)or vacuum leak. Check for bad vacuum hoses first, the IAC is around $50

Jun 22, 2008 | 1995 Cadillac Seville

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