Gear Shift Lever Base Gasket For ISUZU PHR NHS TFR UBS UCS 8970835990 Gasket Quad Box

 

The Gear Shift Lever Base Gasket (also referred to as Gasket Quad Box, transmission tower gasket, or shifter base gasket) is a critical sealing component in your ISUZU vehicle's manual transmission system. It sits between the gear shift lever housing (shift tower / quad box) and the transmission case, creating a leak-proof seal that prevents transmission fluid from escaping while keeping dirt, dust, and moisture out of the gearbox .

This China ISUZU (Qingling) Quality gasket restores the factory seal, ensuring reliable transmission performance and preventing costly repairs.Manufactured with high-quality elastomer compounds and precision steel spring reinforcement, this seal provides a reliable barrier that keeps your rear wheel bearings properly lubricated and protected .

 

Parameter	Specification
Product Name	Gear Shift Lever Base Gasket / Gasket Quad Box / Transmission Tower Gasket / Shifter Base Gasket
OE Numbers	8970835990, 8944739450, 8944219300, 1703101-44, 8-97083599-0, 8-94473945-0, 8-94421930-0
Quality	China ISUZU (Qingling) Quality
Material	High-quality oil-resistant gasket material (rubber/fiber composite)
Function	Seals gear shift lever base (quad box) to transmission case – prevents fluid leaks
Bolt Pattern	4-bolt quad box design
Compatible Engines	4JB1 (2.8L diesel), 4ZE1 (2.6L gasoline), 4KH1CT5H1 (3.0L diesel)
Compatible Models	ISUZU PHR, NHS, TFR, TFS, UBS, UCS
Transmission Type	Manual transmission (MSB-5S, MSG-5B, MUA-5C, etc.)
H/S Code	8484900000
Place of Origin	China
MOQ	1 piece
Warranty	1 Year

Q1: What does "Gasket Quad Box" mean?

A: "Quad Box" refers to the four-bolt pattern of the gear shift lever housing assembly on ISUZU manual transmissions. The "Quad Box Gasket" is the sealing gasket that sits between this 4-bolt shifter housing and the transmission case.

Q2: What does "China ISUZU (Qingling) Quality" mean?

A: Qingling Motors is ISUZU's long-term joint venture partner in China, producing ISUZU-licensed commercial vehicles since 1985. China ISUZU Quality parts are manufactured to the same specifications as original equipment supplied to ISUZU's China production lines – including the popular 4JB1-powered trucks sold globally.

Q3: Will this fit my TFR with the 4JB1 engine?

A: Yes. The 4JB1 (2.8L diesel) is one of the primary engines for which this gasket is designed . This gasket fits TFR/TFS pickups equipped with manual transmissions (MSB-5S, MSG-5B, MUA-5C) using the 4JB1, as well as 4ZE1 and 4KH1CT5H1 engines.

Q4: Is this for automatic or manual transmission?

A: This gasket is designed for manual transmission vehicles only. The gear shift lever base gasket / quad box gasket seals the shifter tower to the transmission case on manual gearboxes.

Q5: How many gaskets do I need?

A: One gasket per vehicle. The quad box (shifter base) uses a single gasket between the transmission case and the shift lever housing.

Q6: Do I need sealant with this gasket?

A: No. This is a dry-fit gasket designed to seal without additional sealant. However, some technicians apply a thin film of transmission assembly gel or grease to hold the gasket in place during installation. Do not use RTV silicone unless specified by your vehicle's service manual.

Q7: What is the difference between OE numbers 8970835990, 8944739450, and 8944219300?

A: These are different generations or regional variants of the same gasket, all interchangeable for the TFR/UBS/UCS quad box. The China ISUZU quality gasket we supply fits all listed OE numbers.

Q8: My TFR has a 4ZE1 gasoline engine – will this gasket work?

A: Yes. The 4ZE1 (2.6L gasoline) was offered in TFR/UBS pickup and SUV variants . The transmission case and quad box design are shared between diesel and gasoline versions of these ISUZU models.

 

 

 

 

 

 

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