1994 Toyota Camry Transmission Failure: P0500 & P0720 Codes - Reverse Works, No Forward Gears

On Chrysler and some Ford models, if the speed signal or range switch fails, shifting will not occur. However, if transmission slippage is severe, it can trigger a rear speed sensor code because the system detects insufficient output speed. If wiring to the VSS is intact, try replacing the sensor first. But if transmission fluid appears discolored, it's best to have a professional inspect the transmission.

I own a 1994 Toyota Camry XLE that has been sitting for three months. Recently, after starting it up in Seattle, I noticed it only goes into reverse and not any forward gears. I was considering having it shipped to me, but before doing so, I want to know if this could be a simple, low-cost fix instead of a full transmission replacement. I'm based in Orlando and would appreciate any insights on possible causes or solutions.

Is the transmission fluid level adequate? A low fluid level can contribute to shifting problems.

My friend checked the fluid while the engine was running and found it above normal levels. However, he believed this might be due to poor fluid circulation through the gears. The car has always run well and has only 116,000 miles. It's been sitting for three months—this is unexpected. My friend suggested I consider junking it, but I believe a second opinion is needed.

Was the engine at operating temperature when testing gear shifts and checking fluid levels? Three months of inactivity in Seattle could lead to condensation and oxidation at electrical connections. I recommend inspecting all wiring and connectors thoroughly. This might resolve the issue without costly repairs.

I'd recommend towing it directly to a trusted transmission specialist for diagnosis and repair.

According to the dealer's manual, disconnect the electrical connector located just below the battery tray—visible on top of the transmission. Use the shifter as a manual: start in neutral, press the brake, shift into low, then gradually move through gears as speed reaches appropriate levels (around 2700 RPM). First gear will feel sluggish if electronics are faulty—but it should still engage. If no shift occurs, the issue is likely mechanical (e.g., worn gears or pump), not electronic. A dirty contact or bad sensor may be the root cause.

The transmission should still allow forward movement—even with VSS issues—though shifting might be erratic. Has it had prior shifting problems? Has it been driven aggressively? The P0500 and P0720 codes do not prevent forward motion. Since reverse works, fluid circulation is likely intact, so the earlier claim that transmission fluid is insufficient or degraded is incorrect. It sounds like two separate issues exist: check for a burnt smell in the fluid—this indicates overheating and slipping clutches. If present, the transmission has sustained internal damage. A qualified independent shop should evaluate this—it's beyond typical DIY fixes.

An update: I took it to a dealer, who diagnosed an internal transmission failure using diagnostic tools. They offer a used transmission replacement for $1,000 and installation at $750—totaling $1,750. I'm in Florida but the car is currently in Seattle. The vehicle was valued at around $K when running well, and I’m no longer interested. Should I pay $1,750 to repair it and sell it locally? Or should I simply move on? It's a 1994 Camry XLE with 117,000 miles—well-maintained except for the three-month inactivity period. Any advice would be appreciated.

If I were in your position, I’d proceed with the repair—only if the used transmission comes with a warranty and the technician has solid experience. This is a complex issue that likely requires professional intervention.