GUH-77 Universal Joint 44×125.5 mm | TH-177 37410-1220

Description

GUH-77 Universal Joint 44×125.5 mm

GUH-77 universal joint is a heavy-duty propeller-shaft cross kit for selected Hino commercial-vehicle applications. The common aftermarket size is 44×125.5 mm: 44 mm nominal bearing cup diameter and approximately 125.5 mm overall span across two opposite installed cups. The photographed supply configuration contains one forged cross, four installed plain round bearing cups, four separate open-ended C-type external snap rings and one 90-degree grease fitting for the threaded center port.

GUH77 and GUH 77 are common writing variations of GUH-77. TH-177 is a widely used alternative model search, while Hino 37410-1220 and 37401-1350 are important OE identification numbers. Some catalogs round the overall span to 125 mm or 126 mm, and others publish 125.4 or 125.5 mm. These descriptions generally point to the same dimensional group, but the removed joint should still be measured before purchase.

Product Features

• Heavy-duty forged cross for truck and commercial propeller-shaft service.
• Nominal 44 mm bearing cup diameter and 125.5 mm overall span.
• Four plain round bearing cups supplied already installed on the cross.
• Four open external C-type snap rings without eyelet holes.
• Greaseable center-port design with a separate 90-degree fitting.
• Search coverage for GUH-77, GUH77, TH-177 and Hino 37410-1220.

Installation quality directly affects the life of a GUH-77 universal joint. Clean the yoke bores and snap-ring grooves before assembly. Press each bearing cup squarely and prevent needle rollers from dropping under a trunnion. Install all four open C-rings in their correct grooves and confirm that each ring is fully seated. The finished joint must articulate smoothly without tight spots before the propeller shaft is checked for phasing, runout and balance.

Technical Specifications

Cross References and OE Numbers

Common catalog and buyer searches associated with the GUH-77 universal joint include TH-177, TH177, 37410-1220, 37401-1350, 37401-1220, 04037-4044 and 04371-E1160. Some market listings also remove punctuation and search the same references as 374101220, 374011350, 040374044 or 04371E1160. These variations are included for identification and quotation searches, not as a substitute for physical verification.

The strongest dimensional catalog sources list GUH77 at 44 mm cup diameter and either 125.5 or 126 mm overall span. The difference normally comes from rounding or measurement convention. However, buyers should also compare the open-ended snap-ring design, groove position, ring thickness, bearing-cup seal position and center grease-port arrangement. A joint with eyelet-style circlips or a different lubrication location may belong to another variant even when the nominal size looks similar.

Typical Applications

The GUH-77 universal joint is commonly researched for Hino 500, Hino Ranger, Hino GD and related medium or heavy commercial driveline applications. Exact fitment can vary with model series, axle, gearbox, wheelbase and propeller-shaft manufacturer. A previously replaced or modified shaft may also use a different cross from the original vehicle catalog.

For the fastest compatibility review, send MR Driveline the old model or OE number, exact bearing cup diameter, full over-cup span, clear photographs of the open snap rings and the related Hino model or shaft number. If the removed part is marked TH-177, 37410-1220 or 37401-1350, include a clear image of that marking with the inquiry.

Why Choose MR Driveline

MR Driveline organizes every GUH-77 universal joint quotation around model code, measurable dimensions, retention design and verified OE searches. This prevents the common mistake of treating every rounded 44×125 listing as identical. We support distributors, repair workshops and fleet buyers with measurement checking, sample verification, packaging options and repeat supply.

FAQ

Are GUH-77, GUH77 and TH-177 the same reference?

GUH77 and GUH 77 are writing variations of GUH-77. TH-177 is a widely used cross-reference for the same 44×125.5 mm family. Confirm dimensions and snap-ring style before final approval.

Is this product 44×125 mm or 44×126 mm?

The common precise market description is approximately 44×125.5 mm. Some sources round it down to 44×125 mm, while catalog tables may round it to 44×126 mm. Measure the removed joint rather than relying only on rounded text.

Can I order this product using Hino 37410-1220?

37410-1220 is a major Hino OE search connected with this GUH-77 universal joint. Confirm the 44 mm cups, approximately 125.5 mm span and open external C-rings before ordering.

What is included in the photographed kit?

The photographed GUH-77 universal joint kit includes one cross with four installed bearing cups, four open external snap rings and one separate grease fitting.

Why must the snap-ring shape be checked?

This kit uses plain open-ended C-rings without eyelet holes. A joint supplied with a different ring design may use different grooves or installation clearances even if the nominal cup and span measurements are close.