Ortopia Transmission Filter for TH700-R4 / early 4L60 Shallow Pan — All‑Metal Screen & Gasket Kit

Ortopia's transmission filter for TH700-R4/early 4L60 shallow pans is an all-metal screen replacement kit engineered to restore proper flow and pressure in cable-TV controlled GM transmissions.

This kit is built specifically for TH700-R4 (700R4) and early 4L60 applications that use a shallow, flat-bottom pan (approximately 2" deep). It replaces OE 8667689 and similar part numbers with a durable metal mesh pickup that resists clogging better than felt or plastic filters, and it includes the pan gasket and intake seal required for a complete service. Use this when performing routine maintenance or when diagnosing shifting problems on classic GM RWD cars and trucks from the 1982–1993 era.

How does the all-metal screen improve performance in a TV-cable transmission?

Metal mesh provides higher sustained fluid flow versus felt/fiber elements, which can capture fine debris and restrict passages. For transmissions that rely on throttle valve (TV) cable control, consistent line pressure is essential; the metal screen helps maintain that pressure and avoids flow-induced shifting faults.

• Higher open-area flow than felt filters
• Less prone to trapping fine particles that alter hydraulic response
• Stable performance under repeated heat cycles
• Designed for transmissions using TV cable rather than electronic control

Will this filter fit my vehicle and how do I identify a shallow pan?

This Ortopia kit fits TH700-R4 (700R4) and early 4L60 models that have a shallow, flat-bottom pan—commonly found on many GM RWD cars and light trucks from 1982–1993. It will not fit 1994+ 4L60E converters without modification, and it is not compatible with deep-pan variants.

• Compatible with Corvette C3/C4 (1982–1993) and Camaro/Firebird (1983–1992)
• Fits Chevy Silverado/Sierra C1500 and Suburban/Blazer 1982–1992/1991
• Not for 4L60E (post-1993) or deep-pan TH700-R4 converters
• Shallow pan = approx. 2" depth, flat bottom visible when pan removed

What drivability issues does replacing this filter address?

A clogged or incorrect filter can cause harsh 1–2 shifts, slipping, delayed engagement, and irregular throttle valve behavior. Swapping to the correct Ortopia metal-screen filter often remedies those hydraulic symptoms and prevents deterioration that leads to costly rebuilds.

• Common symptoms: harsh shifts, slipping, delayed or delayed engagement
• Helps restore consistent line pressure for reliable shift timing
• Prevents contamination-related wear on valve bodies and servos
• Recommended service interval: every 30,000–40,000 miles with Dexron III or VI

What comes in the kit and what should I check during installation?

The Ortopia kit contains the all-metal screen filter with a short pickup tube sized for shallow pans, a reusable farpak-style pan gasket, and an intake neck seal. During installation verify TV cable adjustment and inspect the pan and magnet for trapped debris to assess internal wear.

• Included: metal-screen filter, pan gasket, intake seal
• Cross references: OE 24200161, WIX 58902, Fram FT1122
• Inspect pan magnet and fluid color while draining
• Recheck TV cable and fluid level after service

Who is this for: Owners, restorers, and technicians working on classic GM rear-drive vehicles—Corvette, Camaro/Firebird, Caprice/Impala, Silverado/Sierra, Suburban/Blazer and similar 1982–1993 models—who need the correct shallow-pan filter to maintain hydraulic integrity. If you maintain a TH700-R4 or an early 4L60 with a shallow pan and value dependable flow and correct TV-cable operation, this Ortopia all-metal screen kit is tailored to your needs.